ok so ill give my cents about all noms until now
Heliolisk down to B+, LO residual damage + not so strong + frail to most priority users + too much faster threats + there's no other viable set (i laugh everytime i see scarf) makes Heliolisk life hard in UU.
Rotom-H up to B+, I would give A- for this guy but UU is still too much wet :/
Darmanitan to B-, ur a better with Entei 9/10 times
Doublade to A-, here is a nomination that I fully support. I've been toying with Doublade earlier and I found that it fit as a glue on a lot of teams. Tanking hits like there is no tomorrow, it also offers offensive pressure and if played right, can act as a wincon depending on matchups. Pair it with Hydreigon something to tank special hits and knock off, and ur done for a day. Pretty antimeta I'd say.
I have never seen Moltres in UU so next
I'd say the B+ Rank mons have much more utility than Alomomola, who serves a nice role wishing good luck for his teammates, but that's it. Even top ladders stall teams do not use Alomomola these days. Keep it B rank.
Crobat to A-, unfortunatelly Fatmence (and other dozens variations of it) has been a real trend last weeks and that really hurts Crobat usage as both defogger and fighting check. It also fights with Mandibuzz as a bulky defogger rn, checking different things its true, but essentially having the same role. Still, Crobat has a great speed tie, good bulky, fast Taunts, solid STAB etc, so A- will fit it fine.
Umbreon to B+, I just got bopped over ladder by pokemonisfun stall team and Umbreon was certainly a pain in the ass in that team. Besides all the Mega Pidgeot discussion, Umbreon has a nice role checking physical attackers in UU while threatning they right way. Certainly fits B+ rank mons.
Keep Shiftry C Rank. I could see it reaching B- Rank for his Chrolophyll set in a sun team, but otherwise it's a pretty bad mon. Tbh I used it in a sun team and even there it was an ok mon at his best, Grass/Dark is not a great coverage and it fails to reach some important KOs. "Offensive hazard remover that could beat water mons" that must be the most specific role a UU mon could have. I mean why would I ever leave a water type mon in front of Shiftry lol.
Jolteon bump to B- Rank. It's about time we give Jolteon some love. Completely agree with Ducem points in np: ORAS UU Stage 3.1 post about this guy. Outspeeding most of the meta including most Crobats, Mega Burd, reg Aero, etc, blocking Volt Switchs and pivoting out for other mons is a great role.
Mega Swampert to A+. "Mega slot cost" well ur not burning ur mega slot when taking Mega Swamp for a ride since Mega Swampert is crazy good. I took all my reqs with it in a bulky offense team and it completely annihilate everything in his way. I also got destroyed by one in a stall team a few days ago. Heck, even balance buildings have a good time with it as a SR setter. It fits fine in every playstyle and does a great job in all of them.
Keep Espeon in C Rank. Cmon guys lets get real scarf espeon is a joke and specs espeon is just sad. leave it be.