I don't know it actually makes me laugh when I get hit with an arrow that splosh 20 gallons of acid around me, its just dumb. I just imagine a bathtub on the end of the arrow.
The only surface mechanics I use are grease. I don't use potions because I don't really need them with a healer that can prevent death with a bonus action 8 times with a full rest. The difficulty would skyrocket if your characters actually died outright instead of knocked down. Everything else dies at 0 hp why not you? This feels a bit weird to me.
I have to admit I shove alot just because I can rather than anything else. Same with sneak if i can get out of visual. I am interested on how Larian will introduce difficulty in the game, it could change the game so drastically and for the better in so many ways if dont right imo.