The lack of variety and depth makes it boring in the long run though, regardless of whether you are a munchkin or not.
I agree, the scarcity of build options is my biggest criticism of it, but realistically how many times are you going to play through BG3? You have 8 classes to start with (they said they'll reveal more later) and if it's a 100+ hour RPG you have quite a lot of playtime on your hands.
She fell to 0hp with a normal hit, failed a death save, was hit while downed (another failure), then failed the least save at the start of the next turn. Larian's implementation of death mechanics is actually more forgiving than 5E rules (which aren't particularly lethal in the first place). In 5E, any successful attack against an unconscious character is a critical hit and gives 2 death save failures. (Both companions would've died early in the encounter with those rules.) Larian also made it more forgiving by allowing characters to use potions as a bonus action, among other things.
But the encounters seem more deadly. 5E encounters are usually only a minor threat to your characters, even those which are classified as highly dangerous. There might also be a "core rules" difficulty option, which removes potions as bonus actions and restores PnP death mechanics.