Inescapable grapples: using expertise + reliable talent ment rogues could auto-grapple most creatures. No chance of escape.
An interesting one; personally I don't think this is one I had much problem with all things considered just because a Tier 3 Grapple Rogue was never going to be a good build, but its probably for the best it doesn't work in D&D 2024!
I do quite dislike Reliable Talent in general personally, so the fly in the ointment there is that it got brought down 4 whole levels to level 7. Cannot say I'm a fan of that, but that's just in the 'power creep/more stuff' bucket, not a problem.
Conjure 32 creatures * 2 attacks + crusaders mantle. = +64d4 damage per turn.
Conjure Spells getting removed is a big one! I had that one on my first list before they asked about specifically exploits. Those spells never really did work the way people seemed to think since you couldn't pick what creature you wanted to optimize it that hard, but I think everyone is happier that we don't have worry about their either way.
Level 2 moon druid turning into a level 5 fighter as a bonus action.
...I mean, they get that level 3 now, so... I guess that's an improvement! They did get their free-HP nerfed pretty hard, but they got their AC in animal form buffed pretty hard (+5 for a bear). I suspect that's a nerf at low levels still, especially with everyone else powercreeping up pretty hard.
Repelling blast working on any sized creature (since you have it listed as a 2024 issue, it was the same in 2014).
If only they'd fixed it the other thing I'd be happy! But I guess that's worth at least a quarter of a point, we take those! I've already nerfed it to 1/turn in my games long ago, but I'll happily tack on the size limit.
True Stike being a trap option.
It's interesting here, because it makes everything else sort of a trap option, but I nothing else is as bad as it was. I'm not sure which I dislike more between powercreep and trap options, since both are pretty problematic, but I could see that being a +1, even if I think personally I'd probably count it the other way.
I could go on. But the new book is clearly better.
I'm glad some folks like D&D 2024. Personally, I don't think its for me, though I won't quite write the whole thing off yet. But that's more down to the subjective reasons than the 'broken stuff' reasons. I do think the book looks cooler, and art is definitely something else.
I think my plan (and what I imagine will be very common) will be to a steal a few of my favorite changes and incorporate them into my game, and leave the rest of them for others to enjoy, so to speak.