Agreeing with all of the recent changes, although I'm still not sure I agree that Mega-Sharpedo is quite on the same level as Bee/Aero/Pert. That said, there's no denying that it's scary as hell, and I can't really complain about its placement there too much.
Regarding the new slate...
Venomoth (B+ to A-): UNDECIDED
Man, I don't know if I'm just using this thing poorly or what, but I've been underwhelmed every time I've played with it. It can eat through teams with the right support, but I haven't really found it all that much more effective than many other sweepers in the various B ranges. While Tinted Lens and its nice STAB options means it punches through some common special walls, its poor physical defense combined with LO recoil and rocks weakness means that it rarely gets more than one boost, and with one boost it's not sweeping unless a team is decently worn down. Anything remotely bulky can stomach a hit from it at +1 (and I don't just mean special walls like Snorlax or P2), and it basically can't take a hit on the physical side (Beedrill does like 60% with U-turn, and can do as much as 80% with Knock Off). With the right team support it has been brutal - I've had particular success with hazard stacking offense teams, as it only needs to shave about 30% off to break through common threats like Swampert or Heracross - but with the amount of team support it requires, I'm just not sure I can really agree with A-.
That said, I've seen other people do quite well with Moth, so I'll test this a bit more and see if I'm just missing something.
Hoopa (Unranked to B): AGREE
B sounds about right to me for now. This thing has incredible offensive potential that can just eat through bulky teams like they're nothing, but mediocre bulk and few opportunities for setup limit its usefulness. It also has to compete with other 'mons in similar roles such as Life Orb Reuniclus, who doesn't hit nearly as hard but is backed up with fantastic bulk and the excellent Magic Guard. I've had decent success with both a SubSalac set and a Life Orb + 3 attacks set, but it definitely requires team support and runs the risk of being dead weight. I could even see an argument for B+, but I think B sounds more accurate, at least for the time being.
Aerodactyl (B- to B): DISAGREE
Non-Mega Aerodactyl pretty much solely exists as a hyper offense hazard lead, which it does decently... but still not as well as other hazard leads, such as Froslass. Frankly there are so many decent rocks setters that I don't think its role is an essential one, and while it is arguably better than Sash Azelf as a lead, Azelf at least can put in a surprising amount of offensive pressure with its Life Orb set (which has completely different counters than Sash Rocks 'zelf). Hazard offense is really good right now, no question - but Aero doesn't even fit on every hazard offense team. There's a niche for it, certainly, but not such a large one that I think it's worth a rise.
Tangrowth (B+ to A-): AGREE
Tangrowth is such a good defensive pivot for almost every playstyle. It checks some of the most dangerous physical setup sweepers (Gatr in particular, but it also can tank a +2 Adamant LO Close Combat from Lucario and KO back with Earthquake), while also providing a nice switch-in to bulky Waters, making it invaluable for offense and balance. Meanwhile, stall and semistall also love its ability to switch into a +2 Gatr (as stall teams can't rely on offensive pressure to keep Gatr from setting up) and check threats multiple times throughout a match, as well as the team support it can provide with status moves and Knock Off. While it has some problems, I don't think it's unreasonable to say it deserves a place alongside the other A- 'mons.
Froslass (B+ to A-): AGREE
Remember how I said hazard offense is really good right now? Yeah, it has been killing it in this meta, and Froslass is almost certainly the best suicide hazard lead in the tier. Spikes support is so good on offense right now, especially as an answer to balance teams that rely on things like P2 to check dangerous threats. Not too much more to say - Froslass really only does one thing (yes, I've seen offensive Froslass sets, and no, they're mostly not very good), but it does that one thing better than any other 'mon in the tier, and that one thing happens to be in high demand right now.
Goodra (B- to C): AGREE
For some reason this makes me sad, because I really think Goodra has potential. That said, I try to think of what kind of team I'd use it on and I just find myself at a loss. There are a lot of good bulky dragon types in the tier, and while Goodra has such great bulk, not to mention a solid Special Attack backed by a stellar offensive movepool, there's almost always a better choice for every role you might try to give it. I certainly don't think Goodra is bad... but it's outclassed. Dragalge getting Adaptability was the major nail in Goodra's coffin, as it has a superior defensive typing and scary good offensive presence.