Well, there is one mon that should go up for sure from my experience on the suspect ladder:
Tyranitar to A
This is now absolutely insane. It's been getting better for a while now - Dual Defog stall has always has trouble vs it, Pex/Celes/Venu never had any switch-ins to its moves - but now with Dugtrio gone, it's time it rose. CB Ttar can absolutely run over the vast majority of stall builds - especially that Dual Defog stall, which is the premier stall in this meta I've found - and can occasionally fit on them with Pursuit trapping (it's bulkier than Weavile and more powerful too, as its advantages). It was always borderline A to me but this has pushed it into the ranks of A for me.
I'm also gonna still support
Volcarona down to A. Dugtrio being banned
really hurt this, as what was once versatility is now simply 4MSS. If it doesn't run HP Ground, it now has no way around Heatran, which is extraordinarily prominent in this metagame (even so with Dugtrio, but now even more). Without Psychium Z, it has no way around Toxapex, which also benefitted from the AT ban. Without Giga Drain, any other bulky water will wall it. All of its counters are more prominent in the current metagame, and without the right move, Volcarona is simply deadweight in the MU against them. It's thus becoming less and less consistent at sweeping, and deserves the drop to A.
Wait, are you sure you are not just spamming all kinda of the meta trends and call it "really, really bad for XXX"? Kyurem-B could hardly switch in, and if it does it blows through anything imaginable anyway. Lele is deterred from clicking its choiced psych STAB. You are making sweeping statements that are anything but self-evident, without really backing them up at all.
And in general, baring Fighting-types, many of the "unfavorable trends" you mentioned all have a common problem that none of those pokemon really wants switch into Bisharp anyway. Knock off still hits most of the meta like a truck and drops their item, while the few things that usually tanks a knock off comfortably have to respect Iron Head(the few time when it is actually positive to be an offensive steel). And even at the most dire matchup, it still has one of the most powerful priority in the game. None of those really changed all that much with the meta.
Lastly, while it is easy to acknowledge that Bisharp is not the best among B+. Kartana and Lopunny are both mons that are receiving A- nominations. So being slightly worse than them(if at all) is hardly a shame or anything. Meanwhile, Bisharp excels in quite a few matchups and is never a deadweight in any other. This quality imo really sets it comfortably apart from the mons in B which are far less consistent.
I should have gone over how the trends are bad for it in detail, you're right. Kyurem oftentimes is holding a Z-Crystal and thus can switch into Knock Off, where it straight-up kills from there. In addition, the 3 Attacks + Roost set can easily play around Sucker Punch and Iron Head, turning it into a 50/50. Lele can still use Moonblast and straight-up kill with Bisharp having such poor special bulk. With Dugtrio gone (which is admittedly a huge plus for Sharp, though imo not enough to keep it in B+), Z-Move Lele is rising, meaning that Knock is doing less and less. SubTran is faster and can force, once again, a 50/50 - use Sub and get one up for free, use Magma Storm and kill Sharp. I already explained how DD Zygarde rising over CB is harmful for Sharp, along with Birdspam (it carries tons and tons of coverage against it, which it's not taking very well at all). It's relying on Iron Head more and more now, which isn't good as Steel is not a good offensive typing at all in this metagame. In addition, Stall still has Sableye-Mega, which can burn Sharp.
Nowadays, it's relying on 50/50s - click Iron Head or Sucker/Knock. If it loses the 50/50, it dies. This is making it less consistent in this metagame and as such, it should drop.
EDIT: Also backing Kyurem-Black to A. Pex/Celes/Venu is just steamrolled by this, and the LO set is beginning to rise back up into prominence as it's a rather versatile set. It pairs extremely well with Koko, which is absolutely fantastic in thie current meta. Dual Defog stall also has tons of issues with Icium Z, which can break through the majority of mons on the build. It's never deadweight vs offense tho, being rather bulky and Dragon letting it check a large amount of mons on it.
Also, just gonna say that while Hoopa-U did get better, I'm not sure of it rising. Dark/Psychic just really sucks in this metagame, with Weavile still trapping it regardless and CB Ttar doing the same if it's locked into the wrong move. It's super strong vs stall and all but it's still as bad as ever vs offense, only slightly better with Dugtrio being gone. Not worthy of a rise imo.
In addition, don't drop Skarmory. This is honestly a hasty nom made just because Dugtrio's gone, but is absolutely wrong. Stall did take a hit, yes, but is still decently effective and common. Skarmory is a cornerstone on pretty much every stall team out there. In particular, it's vital to non-SPL stall, and considering the fact that SPL stall was hit the hardest by the AT ban, and the other stall builds are still decent, this shouldn't drop at all.
I can also get behind a Weavile rise. In general B+ is kind of messy rn so I'll address that in a later post.