@JandK For each edition of DnD feedback is given: what works, what doesn't, what's obsolete - over months and years of people playing that edition. Eventually, a new edition comes out that is balanced around gaming trends, fun, and providing enough challenge. Arbitrarily deciding not to implement certain features of certain classes (either because they are too hard to implement with the engine you're using or because some people testing an incomplete product complained about it) will never be balanced, no matter how many points you assign to Darkvision, +2 Charisma or Sleep Immunity. The fact that the OP pointed out some issues and you noticed others, doesn't invalidate his argument... rather, both should be taken as examples of unnecessary rule changes.
Perhaps it is about faith, in the sense that, a lot of the Baldur's Gate playerbase put their 'faith' in the DnD ruleset to provide a balanced experience that is both fun and challenging and seeing Larian mess with that is worrying or disappointing.

I think you misunderstand me.
I've played DnD since the original box version, back when playing an elf was your class. I've been involved in more discussions about game balance than I can remember to count.
I'm not pointing out issues I've noticed that take away from the balance: I'm saying that the "balance" of the game is not so delicate, not by half. Removing sensitivity to sunlight does not break the balance of the game.
And the development of the various editions is not based in some grand science. There are plenty of arbitrary decisions. "This *feels* about right, so let's go with it." And it results in a system where some classes are universally considered more powerful than others.
It's just the way it is. It's always been the way it is. So appeals to explicitly follow 5e because of balance don't move me. In time, there'll be a 6e and advocates for that system will be certain in their faith that it's delicately balanced. And playing around with this or that still won't break it, anymore than BG3 is broken because of a lack of sunlight sensitivity.