I'm more of an RU guy, so I'll list my thoughts for the mons set to drop there.
When looking at Honchkrow, the obvious comparison is made with Absol, as their stats are near alike and are both dark types, though I believe Honchkrow is better for a few reasons. Honchkrow firstly has the Flying type, which allows it to fuck over revenge killers like Hitmonlee, Gurdurr, and Vaccum Wave Poliwrath, as it is neutral to their priority moves, plus it has STAB Brave Bird which fucks over the common Fighting types that are used to take on Absol. Secondly, with 105 SpA, it can go mixed much easier with access to moves like Heat Wave and Dark Pulse allowing it to fuck up MegaLix and other psychical walls. Thirdly, its abilities aren't near useless as Moxie in combination with Sucker Punch is a great combo, and while pretty niche, Insomnia allows you to switch in on Amoonguss and Sleep Powder Venu easier. Yeah, Absol doesn't have a rocks weakness and has Knock Off, but overall I feel Honchkrow is better in the role of a dark attacker, and I actually expect it to not last too long as Absol is already on the ropes between broken and not, and Honchkrow is better than it in a lot of roles, so yeah.
It is hard to tell the future of Cloyster if it does fall to RU. For one, its Shell Smash set would be very deadly, with Icicle Spear, Rock Blast, and Hydro Pump possessing great coverage, and with good enough speed to outrun scarf Houndoom with +Atk nature and Scarf Durant with +Spe nature. And a suicide lead set doesn't sound that awful, being a nice lead with Explosion, Spikes and Rapid Spin. However its typing is pretty meh defensively, being weak to all forms of hazards and common types like Fighting, Grass, and Electric, and while its Defense is huge, its HP and SpD doesn't do it any favors, being KO'd by any strong special attack, and at least 2HKO'd by a special attack coming from anything with a respectable SpA stat. (252 SpA Medicham Psychic vs. 0 HP / 0 SpD Cloyster: 169-199 (70.1 - 82.5%) -- 62.5% chance to OHKO after Stealth Rock <- No one runs that but still.). So overall, while it is very potent when set-up, it would find it difficult to set up, so I think it could stay, but being banned isn't exactly off the table either.
Though they aren't guaranteed to drop, discussing their potential never hurts, plus I can just copy and paste this to the NP thread so I can feel like I contributed if they do drop xp.