So Yama is gone. What gets better? I could state obvious stuff that's currently RU, but I'm gonna go a different direction
: I feel like it's been picking up some steam lately anyway, but man does the Yama ban help Zoroark a ton. Special sets in particular gain a lot of value since they don't have to be concerned about using its STAB and being punished by a game-ending sweep, but physical sets are probably the better route because of how good Knock + U-Turn with its Speed tier is. If it wants to go the SD route, it probably needs to be Tera Poison to deal with Slowbro post-Tera and the Fighting resistance might just be enough to save your skin from a Scarf CC. Alternatively, Dark switch-ins on the special side are pretty sparce aside from Blissey and can turn Specs Zoroark into a complete nightmare if disguised as the likes of Aqua Tauros or Flamigo as those two in particular tend to draw out Slowbro like a magnet and are all too happy to punch Blissey into the ground.
: Thick Fat Hariyama was one of the few offensive Pokemon that could safely switch directly into this and not immediately die or take 60%+ from a move. The Speed tier is a little shaky on Frosmoth considering its not very bulky on the physical side and the tier has plenty of physical attackers to pick from, particularly Scarf ones like Tauros and Flamigo, in order to put the pressure on it. It's also not the biggest fan of Brozong, but that isn't too big an issue considering how hostile the tier feels toward the bell rn. Wouldn't shock me much if this rises to RU proper or even potentially gets QBed / suspected now.
: Oh look, more Ice type mons that Thick Fat Hariyama gave grief to. While Rain isn't the most common or anything, having a mini-core to turn the tables on it isn't exactly the worst thing in the world. And, oh yeah, the above Frosmoth also kinda loves Snow's Defense boost.