As a disclaimer, I'm a mostly inactive player who comes from primarily an SM background and I haven't played too much SV, but I've also watched a fair share of higher level games in the tier and wanted to quickly share some of my thoughts. I feel like Revival Blessing isn't very good - or rather, the option of using it isn't great because it's tied to Pawmot and Rabsca. Revival Blessing at the moment has felt more like a gimmick to me, tied to Pokemon that otherwise wouldn't ever be considered for OU play. I've seen mainly Pawmot and it's felt super underwhelming, and I could see Rabsca maybe having a higher ceiling with Trick Room teams, but Trick Room has always been a fringe option anyway. It kind of feels to me that by using Pawmot or Rabsca, you're choosing to use almost 5.5 OU Pokemon anyway, so the ability to revive a fallen Pokemon to half health seems kind of balanced. I get that isn't a perfect analogy because it's not like you're literally using fewer than 6 Pokemon, but I'm trying to say that there is an opportunity cost to using Pawmot or Rabsca in a tier filled with so many powerful options, and Revival Blessing doesn't appear to me to outweigh that cost. I also understand that Revival Blessing is brand new and people will likely find better ways to utilize, but I've seen a lot of people trying to revive Annihilape and go for a Rage Fist sweep or something along those lines (and to be honest, I don't even know what the Rage Fist interaction is with being revived, although I'm sure that's already been discussed). Annihilape also feels somewhat gimmicky to me (although not as much as Revival Blessing does) and I haven't found it hard to play around the Annihilape-Revival Blessing tactic. I think that using something like Hatterene to Healing Wish is probably just a better and more effective form to achieve something similar to Revival Blessing, and Hatterene seems to have a place in OU at the moment regardless.
As a whole, I feel like there is a lot of theorymoning traps that people often fall into at the start of a generation, and Revival Blessing feels like a prime example of that. In particular, I've seen some discussion of Rest-Talk Revival Blessing, and that truly sounds horrible to me. I think that over time and as the tier settles, we'll see "traditionally good" mons like Great Tusk, Iron Valiant, and Chien-Pao rise to the top and we'll look back on the discussion around things like Revival Blessing from a very different vantage point. Again, I could easily be wrong and I admit that I haven't read much of this thread or played much of the tier, but these are just some thoughts that I've had.
As an aside, I don't feel like everything that has historically been a more fringe playstyle is just a gimmick in SV that will eventually fade. Sun in particular seems legitimately good, but that's because it is tied to Paradox Pokemon that are obviously extremely strong in their own right. Dual Screens HO also seems to be a legitimate playstyle and Grimmsnarl has certainly been buffed, but I'm less optimistic about it remaining as viable going forward. I think that Gholdengo dissuading Defog (Defog being less widely-distributed may actually be the bigger culprit, although Gholdengo preventing Corviknight from Defogging is massive enough on its own) is also one of the reasons why Screens HO is benefiting. I know there’s been some talk about Talonflame being able to Defog against Gholdengo, but I don’t think that Talonflame is really a good option at all. Similarly, Maushold can remove Screens/hazards against Gholdengo with Tidy Up but Maushold does not seem good either. The main impact that Gholdengo has on the hazard dynamic is really being a Spin blocker while also, and more importantly, stopping Corv from Defogging. Gholdengo (and mostly because of Good as Gold) feels to me like it's warped the tier more than anything else, but I don't think that's necessarily a bad thing. SV feels unique and fun to me (I'm not saying that it's perfect either or won't require more tiering action), and while I think that the tier would likely still feel that way without Gholdengo, it's hard for me to say either way whether I think that Gholdengo's presence improves the tier - that's also obviously something that can't be decided without copious amounts of examination, and even then, you really ever only know how you answer subjective questions like that in hindsight, but I'm just kind of thinking out loud here.
I've started to ramble but I'll end this meandering post with two more random, unrequested thoughts: Dragapult seems really good to me, especially if Screens HO does become an established playstyle in the metagame (thanks to Pult having Infiltrator) and/or if Terastallization remains in the tier, since physical Pult benefits from it a lot. I think that Pult is being overshadowed by new toy syndrome but will reclaim a very prominent spot in the metagame in time. Similarly, I feel like while Glimmora will always be a solid lead hazard setter, I think that it will fade from how prominent it currently is in time and other hazard setters, like Garchomp, will overtake it. Anti-Glimmora techs have already become more common, like under-speeding it with Great Tusk so that you can Spin to remove whatever hazards it sets (including the Toxic Spike from Toxic Debris, since Rapid Spin's removal happens after Glimmora's ability is triggered) and then becoming faster from the Spin boost to threaten Glimmora out. Iron Treads also seems very good to me and kind of underrated at the moment, and it destroys Glimmora as well. Hazard stacking as a whole is and will always remain good, but the meta is already adapting to the aforementioned influence of Gholdengo. Treads and Tusk run Knock more to hit even Balloon Gholdengo, but my stream of consciousness has probably started to overstay its welcome a while ago, so I'll end this post now with a summary of my main views: when the dust settles, I think it will be the "old reliable" and "traditionally good" Pokemon and strategies that form the tier, so I don't think that people should get too wrapped up in or concerned about the "weirder" and newer strategies/Pokemon that feel more relevant at the moment. That isn't a groundbreaking thought and again, I very well could be misinformed or incorrect about all of this, but I felt compelled to get some of my thoughts out there. Thanks to anyone who read this; I hope you're all having nice days!