being able to stockpile tons of barrels to nuke any enemy with
Making such things just in front of any potential ennemy should trigger immediatly the fight.
But preparing an ambush to lure some tough ennemies is quite interesting to do

I made it several times here instead of rushing against a bunch of ennemies.
In DOS2, I really liked being able to use the environment to help to eliminate some
tough ennemies. So it does not bother me here even if it is a D&D based game.
To be honest, as GM and player, I am not always following the official rules. Key word for me should be fun and there are too many D&D rules, sometimes not user friendly.
Trust me. I took a great pleasure to throw a Greek fire bottle
in a room with zhentarim agents hidden behind fire wine barrels

My point was just about the visual aspect of the floor. Not barrelmancy.