"learning" from this implies its inherently a bad thing. But it really isnt. Like I'm not saying you can't find the design space they operate in annoying, or maybe consider them overtuned depending on the move/ability (it is a little funny how I've seen complaints about being the same, being worse than a similar AND being better than a similar), but being annoying to you or not the design work you want out of the series is pretty subjective. The fact this is effectively their fourth go around with this design philosophy probably implies they just think they're neat.
"Insincere" is also kind of a weird way of putting it; I know we've been through this rodeo before (and weill continue to do so again and again and again) where similar sentiments come forth but again maybe it's not always cynicism for why the design is the way it is.
I also feel similarly about throwing around the word "bloat". Abilities probably contribute the least to bloat in terms of both user design (there's only up to 3 to worry about per pokemon) and game design (the effects are mostly coding based with no real modeling outside of special instances and often variations on other more complex stuff and there's significantly fewer of them and the only times they get cut is when the Pokemon gets cut and evne then they're often still fully functional!). Moves are the only thing that had a "xit" to them and certainly have more design worker into them from balance and modeling and then..... they mostly only axed a selection of bad-to-meh moves and then continued to add more and more signatures and now a full gen later they're doing it again. So it clearly isn't affecting that much. And in terms of movepool bloat, per pokemon, the way the moves wind up distributed rarely matter since they go to one or two pokemon at a time and they are relying on the other generations offering hundreds of moves. From a user perspective there's a lot of cruft they ignore but most of that isn't on the new stuff.
And hey since I'm on this dumb soap box, Item Bloat. I've been on that side of the conversation before but I think at this point I've refined it to "most people are just annoyed at bag space". It feels telling to me that when people complain about item bloat its often just at evolution items or form change stuff, and more specifically abotu the "main item" pocket. There was a LOT of complaints about say the 2 pots and the 2 apples and the various key items to collect for form changes and memories and so on. But in aggregate there aren't a lot of those compared to everything else. Comparatively speaking far fewer cared that the TM pocket now carries 200 (SWSH) or 170 (SV) of the damn things. No one's ever really complained about the nearly 100 berries. All these food items they have for sandwiches or whatever. People rejoiced at getting all the old Pokeballs back....probably because there's an entire dedicated bag space for each of these things!
If the game just sorted items better (vitamins, feathers, exp stuff can go in the battle pocket or the medicine pocket, for example), had more Pockets (held items go here, evolution stuff goes there, etc) or hell if there were sub headers within a given pocket I think most people wouldn't even care at all. Especially if the stuff was easier to get.
At least that's how I feel about it at this point. Nearly 50 mega stones is a lot, and they probably should have just condensed it to a single "Mega Stone" to begin with, but I instantly stop caring the moment you put those 50 stones into their own dedicated pocket and not lurking at the bottom of my main pocket bag where i have to keep scrolling around to find stuff and it makes me really annoyed every single time i go into it and then I come onto a forum to complain about it at length for 3 years.
Incidentally.....
SWSH, before DLC, introduced 34 non-Max moves. 30 of these were unique to a specific Pokemon lines (the fossils i am putting together for this since its based on the heads).
SV introduced 44 non-Torque moves. Counting the Ruin quartet together, there are 31 of these unique to a specific Pokemon. To my surprise several ones I thought would be unique are also given to other, unrelated Pokemon so it wouldn't surprise me if DLC or future games somehow finds a way to spread that love since it's already on their mind. And they had several new moves that are just...plain jane normal ass moves. Not even limited distribution or anything.
And in terms of abilities SWSH (again, before DLC) introduced 25 and all of them unique to a Pokemon. SV introduced 31, 27 being unique; I'm counting the Paradox abilities as non-unique because man seeing 7 of these things have the same ability and another 7 having the other its like...gotta have some give here. If I went into Gen 7 I would also give the UBs a pass on sharing Beast Boost; there's 11 of them its fine
So it's more than SWSH but it's not that much more.