[quote=Aurgelmir][quote=Zahur][quote=Aurgelmir]
When u mean movement matters, do u mean walk to enemy back every turn? Then why not just give advantage face to face then. If you are repeating it every time, there's no tactical depth in it, and also enemy is not clear enough to do the same movement, it's more like exploiting an oversight.
Well yes, but thing is, right now there's another house rule that's making it matter less, which I'd rather see them remove: "Everyone get's cunning actions"
This is the big problem, and what makes the advantage rule silly. Take away cunning actions from everyone, and now you have to either take the Mobile Feat (which isn't working right now) or decide if you want to try and move to the back of that one monster and risk an attack of opportunity from the other one you are in close combat with.
The problem isn't really with the "exploit" as you call it, but rather the poor design decision on the combat actions side.
As for the "opponent's don't do it" argument. Sure, to me that's a difficulty level thing. At normal levels they might not do it, but at higher difficulty levels they could start doing it.