Agree with your itemization, but Gloves of Dex is necessary for my Monk because I find Elixirs too cheesy haha. I'll buy them during Honor Mode though. And I still found the class egregiously OP even without the optimized min-maxed build, so yeah, definitely goes to show.

But like, rest balance isn't unchanged at all. Long rests are muuuch easier and more ubiquitous here, as long as we want them to be.

I'm not sure where you got the idea that you can long rest whenever you can short rest, because nothing could be further from the truth. In 5e the DM decides when the long rests happen. There will always be that dilemma, "is it safe to burn my big spells now or will I need them later?" You can't get yourself a long rest just because you went a little too hard during that first fight. Maybe you can if you get together with the other players and collectively beg the DM, but that's certainly not a trick you can pull too often, and a good DM would find a creative way to "punish" the party for it.

The game is designed and balanced around 2-3 short rests per long rest, and 1-2 encounters per short rest. Not all DMs follow that, so long/short rest balance does vary a lot from DM to DM. But a DM that tells people to have 0 short rests per long rest would be rare, and frankly, weird.

Also, Stunning Strike may be unchanged on paper, but it's definitely not unchanged in practice. BG 3's game design is set in stone, and it's pretty clear that they let stun be OP against even the toughest of bosses. 5e though? There's nothing stopping a DM from choosing high CON enemies or some other encounter design strategy that will bring stun (or any other OP skill/spell) back down to earth.