I'll now post my thoughts on possible major changes I'm most interested in
Lickilicky from A- to B+
I'm on the fence on this one actually...I mean Lickilicky is one of the key Pokemon on stall and it's stats are very well rounded for the tier, which makes for an unpredictable Pokemon (we saw in The Best Next Thing how many different sets popped up, from defensive variants to offensive ones). The actual problem about Lickilicky, as Kingler already said, is the problem every stall team has: it can't handle pressure from common offensive threats such as Mixed Simipour and Poliwrath, and the list doesn't end there as there are plenty of offensive Pokemon in the tier that could trouble it. Another thing is that its only reliable recover stands in Wish, but that's not really reliable at all as some people already said, bc it makes Lickilicky waste a turn, fundamental for opponents to set up or switch to a more favorable matchup, which is lethal for stall teams, and waste a moveslot too.
Mightyena from B+ to A-
I totally approve this from the moment Throh and Sneasel got banned, as Mightyena really is a premier choice for Dark-spam teams now(before it was also considered most of the times but now it gained even more usage), and from what I've seen and tried, it's just unstoppable against slow paced teams, as it can just steamroll a game thanks to Moxie, still being hard to revengekill from more fast teams thanks to Sucker Punch. Also wanna note its access to elemental fangs such as Ice and Fire Fang, Iron Tail and Play Rough, which make it a even more difficult Pokemon to especially counter.
Whirlipede / Venipede from B- to B:
I don't even know why these guys weren't B already LOL. Of course I approve this, also being an avid user of entry hazard stacking, Whirlipede and Venipede are the only fitting choices for Hyper Offense teams that want Spikes and Toxic Spikes support, being the fastest entry hazard setters thanks to Speed Boost, therefore able to place at least one layer spikes / toxic spikes more fast than any other option such as Roselia, still being sorta threatening with Endeavor. They're kept from being really good because they lose to some stealth rock leads, as the ones that carry Rock Blast totally obliterate them, other than being set up fodder for a lot of things into PU at the moment, especially now that the tier is filled with offensive powerhouses, which could be lethal for HO teams that count over not letting dangerous threats set up. STILL B RANK WORTH.