I have to agree with you in most of your takes. There's one I do not though and is the utility of on-demand speed without restrictions of Embody Aspect (Teal). There's tons of pokémon who wish to have that extra speed bump, most notably powerful special wallbreakers and choice users like Kyurem-White, Eternatus, Mewtwo-Mega-X or Kartana.OK so DLC's out and we have most of the information pertaining to BH, so i'll just summarize it here (using this doc as a reference)
Mind's Eye - Accuracy can't be lowered, Ignores Evasion changes on the target, Can hit Ghosts with Normal and Fighting moves.
Toxic Chain - May badly poison the target when its hit with a move.
Embody Aspect - Boosts Spe/SpD/Atk/Def by 1 stage depending on which variant of Embody Aspect is used (its the same case as As One, where two different abilities have the same name).
IDK, I'm slightly worried that now Modest Lunala can outspeed +Speed Deoxys-Attack, because that's the thing, most pokémon are sitting on the base 90-99 speed tier and the fastest pokémon in the tier is Pheromosa at 151, which means this traslates to "your pokémon always act first if it has more than 85 speed" and we all know how important speed is in pokémon. What's more, any pokémon on the base 90 can outspeed Zamacenta and Miraidon without even investing the nature in speed, and there's just so mane pokémon who are held back by their middling speed and prediction reliance.
On the plus side, this might allow the meta to be less stall-oriented because pokémon with this hability have to invest into power, so it might be a good thing for the meta as a whole. Still, is good but not OP considering speed boost exists, but speed boost is hindered by delay, unlike this.
The power boost is banworthy and everyone knows it considering gorilla tactics got banned for less. To keep it cartridge accurate, you should keep it banned up until you discover if the hability is available without tera.
Since you have not given an opinion about the returning moves but Grassy Glide, I'll do my best to explain those.Returning moves
Take Heart (Calm Mind + Refresh)
Changed moves -
Glide got fucking nerfed again to 55 BP lmao
Doom Desire : I doubt an steel type future sight will see play considering how bad is steel offensively. Maybe Dialga-O can use it?
Tail Glow : This move is broken, specially with Teal to get a +3 special attack alongside the +1 in speed. Just ban this because we know it's too much for the tier.
Take Heart : Technically it's new move, and it's amazing. There's so many setup sweepers who get ruined by poison constantly, and this move is precisely that for special attackers. Is it broken? I dunno. On one hand it negates the counterplay to setup sweepers which is putting them in a timer due to chip damage and/or paralysis. On the other hand, I don't think people want to lose counterplay to the obnoxious mortal spin.
Dark void : We know it's a bad joke both Darkrai and Dark void... Why is Darkrai still banned in OU? Is not like fast and strong attackers are too much for OU as seen by Dragapult. Move banned by technicallity, not due to power level.
Seed Flare : Shaymin-Sky is a joke in this format considering it's not even able to outspeed Mewtwo or Necrozma-Ultra. Meanwhile Seed Flare was good in the past but nowadays I feel people who wants grass coverage will just go for Magic Guard Chloroblast, as well as Lumina crash for the special defense drop.
Toxic thread : Why would I play this over mortal/rapid spin, Toxic, Glare, Salt cure, Thunder cage or toxic spikes? Seriously, this move just lacks a niche.
Clangorous Soul : It's no retreat but you lose life instead of getting trapped. Might be worth using on offensive Ghost-Arceus. In general it looks quite the powerful tool with simple, but needs to be used alongside an unaware pokémon to avoid Chansey issues, unless you're using the aforementioned Arceus-Ghost.
Clangling Scales : Finally, a better move than Dynamax cannon for special dragons. Nothing banworthy, just a slight upgrade from dynamax cannon/Spacial Rend for teams without great Hazard control.
Blood Moon : In most cases this would be an autoinclude move for pokémon of X-typing. In the case of normal type it's a worse boomburst.New moves -
Blood Moon - Special Normal Gigaton with 140 BP.
Ivy Cudgel - Grass, 80 BP, boosted Crit Rate.
Raging Bull effect for Ogerpon formes.
Matcha Gotcha - Grass, 80 BP, 90 Accuracy, 50% Drain, ??% (likely 30%, will edit in when known) Burn.
Fairy Feather - Fairy-type equivalent of Mystic Water / Soft Sand.
Ivy Cudgel : It's a worse flower trick/Power whip. Could have seen play before gen 9 but it's just too late. It's 100 BP vanilla though, not 80 with high crit rate.
Matcha Gotcha : The burn rate seems to be 20%, not 30%. If it was 30% I could see it as a move used by regenvest Kyogre and defensive Miraidon to deal with ground types while threatening a burn on dangerous sweepers, but 20% is just too unreliable.