Love the VR update but a few changes (also why Absol? However I haven't tinkered with it)
Exeggutor-Alola
B => B-/C+
Our good ol' tree is a shell of its former self. Ranked B way before the days of Mega-Audino was a thing and now that Aromatisse has pretty much overtaken its spot as the best OTR mon in the tier, it's only got a stronger STAB (worse coverage however) but without a set up move or as good as a defensive typing while setting up the room. Coupled that and the ability to get freshly killed by the now S-rank Sneasel in TR and we can see it's fallen from grace.
Froslass
C+ => B-/B
While it has a shitty matchup vs Sneasel, this gets plenty of free spikes/taunts(/even D-bonds are tricky to play around) against many slower bulkier builds. Pretty much any Cryogonal/Altaria/Xatu/Articuno balance/stall struggles to effectively stop it from spiking up except if Sneasel gets in. Like even when against Sivally-Steel or smth, won't kill and gets taunted if it ever tries to fog away. Definitely not C+ material imo.
Scrafty
B => B-/C+ (I really want this lower but others can chime in)
I really try not to view this as a low ladder meme but it seems like it cannot pull off a sweep nearly as consistently as other set up mons like Klinklang or Toxicroak and it cannot hold its own in a meta where if non z-iron tail, invites a free Aromatisse sweep in return and if iron tail, misses out on recovery or high burst damage with a worse generalist z crystal. It's always just been a lackluster mon in my eyes as it simply CANNOT break the most prominent wall in Mega-Audino while gets cleanly 2HKO'd not to mention stuff like Whimsicott and Scarf Dazzling Gleam Delphox have always been around.
And anything involving shed skin & rest is a MEME
Sandslash-Alola
UR => C/C+
Sandslash has been (kinda) officially free! I think we've all see the good ol' Z+V1 hail HO or variations of hail HO in general and this thing is a lot harder to wall/outspeed than one would imagine. After an SD, it can crush pretty much most defensive cores (think about it, even the super fat physdef mons like Steelix/Rhydon/Regirock get chipped hard by hail as is and can be brought into +2 EQ range) and is excellent against both of the BIG drops in Venusaur and Heliolisk being able to cleanly KO both. I'd argue it's more consistent than Ludicolo due to hail itself being a simply more consistent style with an auto setter of its own and walled a bit more across the board.
Typhlosion
B- => C+/C
Typhlosion hits hard and that's about it. It's very difficult to keep it at an effective health range throughout the course of a battle to justify this over options. Stealth Rock? Well now it's essentially a worse Delphox. They have a healthy fire check? Well shit not like it has secondary STABs. It can't even stay in against mons that it can kill but outspeed and do a chunk to itself. And with Altaria graciously flying about, it can't hope to ever break that (I guess you can choice lock yourself into HP ice on the switch but how good does specs HP ice sound against Klinklang or Aromatisse). Something like Fightinium Z Magmortar that serves a similar role can bluff A-vest and still take special hits if need be while Typhlosion is extremely high maintenance and has only one set.
Virizion
Stay where it is
I feel like the last person to argue for Virizion however people are undermining the fact that this really annoys several balances especially ones that revolve around Heliolisk breaking and overestimate how well Venu can take a +2 Cont Crush (like cmon it does like 68% min and almost dies after rocks after a high roll while sludge bomb isn't a be all end to it either all doing like 48-57%). Xatu/Garbodor is being played less and this forces Type:Null right back into the ball. Now obviously it will struggle against Druddigon and forced out by stuff like Scarfboar but it should retain its position not really as a pure breaker but a mid/late-game sweep mon with many decent set up opportunities.