I think the difficulty of respeccing should be the inverse of the length of the game. If you're playing a quick roguelike where it's all over in a couple hours

I think the difficulty of respeccing should be the inverse of the length of the game. If you're playing a quick roguelike where it's all over in a couple hours at most: no need for respeccing, the class constraints add replayability. If you're play a 80+ hour epic: respeccing should be easy. Making players stick with a class choice they made at minute 0 when they literally knew nothing about how the game actually plays just seems silly. Especially since most people won't actually replay the game and experience the other classes.