Melcar
Arcane
Immunity to poison and fear make it OP. These two status effects are killers in BG1. An Inquisitor's unnerfed Dispel Magic makes all "hard" encounters in BG1 trivial. Archers and Sorcerers just straight up break the game, but they're fun to use if it's not your first run. I guess Monks and Wild Mages would be interesting challenges in BG1, but personally I never bothered with those classes/kits.BG1 non-ee worked just fine for me last time I tried it on windows 10. Was surprised, no tricks needed.
You are right.I don't have a hate boner for BG2 but BG1 itself should not be played in the BG2 engine, its an unbalanced mess.
Baldur's Gate was not designed with kits in mind. Kits like Berserker and Inquisitor and Cavalier absolutely destroy the balance of the first Baldur's Gate.
Berserker, sure.
Inquisitor? Magical protections aren't a huge deal for most of BG1. Wouldn't say its powerful at all.
Cavalier? A straight fighter with 4 pips in a weapon has +2 AB +3 Damage vs. everything compared to Cavalier having +3/+3 vs. a small handful of enemies. They also lose the ability to lose ranged weapons which are king in BG1. Straight downgrade from a non-kitted fighter.
Of course, this is all assuming it's your first run ever. For the average Codexer it just does not apply as we all know the ins and outs of the games by now.