The overwhelming amount of surface effects was the main reason I really disliked DOS combat. Instead of being something 'dynamic' it became a constant in every fight. Instead of walking you start jumping everywhere. I'm fine with it being a DOS thing, its up to me to deside if I want to play another DOS-game. But if something is heavily advertised as 5e then I expect 5e to be the main game and maybe slightly flavored with some DOS elements that FIT into the 5e system. Repeating the surface gameplay from DOS in the same intensity doesn't fit 5e. Every now and then to make a fight memorable or to exploit a situation? Great - it adds to the game. Having to set a whole part of the map on fire to just notice a difference to another regular fight - sorry that should stay in DOS.
