There were some good ideas that I’m disappointed don’t seem to be making it in, and I can understand being upset about that. But the edition is not worse for the lack of change. It is, at worst, the same, which to me is still my favorite version of the game so far. And there have been some changes I think are genuine improvements, weapon masteries and cunning action being the most significant of them, along with some tweaks I’ve wanted for a long time like the Origins changes. Has WotC squandered a lot of potential in this playtest? Absolutely. Have they still managed to get a positive net result? Also yes, in my opinion. Exactly like what happened with D&D Next.
I mean, that's the problem for me, I guess.
I accepted 5E as the "apology edition", and as a pretty good edition of D&D, albeit with some significant issues and imperfections. This was an opportunity to fix pretty much all of that, and initially, it honestly looked like they were gung ho to fix pretty much all of 5E's issues.
But at this point they seem to be fixing issues and exacerbating issues in about equal measure, with absolutely no vision of what they want 2024 to be, and whilst we don't see the final product yet and indeed I think we will be surprised by what comes out in 2024, because I very much doubt it will match the "final playtest" or "final UA", my expectation is that the pluses and minuses will about equal out or the minuses will be slightly larger, not because of anything extreme or angering but because relentless blandification.
Which for me will mean I'm back to where I was in 2014 - willing to play but refusing to run D&D. Not a great place. Certainly not paying money for WotC D&D products.
Or I could be wrong and the new edition in 2024 could be a significant veer in the right direction. I just very much doubt it with Jeremy "No ideas, only surveys" Crawford in control. And of course 2024 isn't the end of the story - products from 2024 onwards could either continue to be relentlessly bland, or even make it worse, or we could suddenly see something interesting happen (again very unlikely unless new blood gets in charge of 5E).
The only thing that I could possibly see rescuing 5E apart from a surprise turn-around with the actual 2024 book content is WotC going all-in on 3PP content for Beyond. D&D is crunchy enough that I'm not interested in running (or even really playing) it without digital support, but the lack of 3PP stuff means I'm hesitant to use 3PP stuff which isn't straightforward (adventures, spells, magic items). If they can change that I might be convinced, but my guess is WotC quietly backs away from promises re an actual 3PP store by indefinitely delaying it and blaming the Beyond staff, whilst aggressively pointing towards their selected partners to claim they already did what they promised and will expand it "any day now".
Btw talking of changing minds I now largely agree with people who say 2024 isn't looking like a full new edition, it's much more like a 5.5 - more actual changes than 3.5E by far, no question about that, but their substance isn't looking to be larger. The earlier UAs certainly indicated a new edition of at least 2E magnitude but they seem to have dropped most of that.