That's fun to read players saying "don't stay true to TT". They even don't understand that many things suck in BG3 because... They didn't stay true to D&D.
Or their opinion differs from yours.
"We have to rest every 30 minutes or after each battle" sounds more like a fact than a matter of opinion.
Larian's design choices leads to this situation, not the rules of D&D.
There are definitely some 5E features that will be a plus when and if implemented (expertise, FI). There's also some stuff (book Ranger) that's best avoided. I dunno, I'm never gonna be interested in a game that sacrifices DnD rules to cooldowns, but let's not pretend that the 5E ruleset is some holy grail. It has its pluses and it has its flaws, and some of those flaws are best avoided. I think Larian should focus on point improvements and rebalances, though, rather than trying to reinvent the ruleset.