I don't mind backstab giving advantage, but then you need to add another rule that says you can't move around behind an enemy in a melee without provoking attack of opportunity. That's where the problem comes in. It's too easy to get backstab because every round you can maneuver behind them ESPECIALLY with Disengage as a Bonus action.
I mean, I actually think backstab makes sense as an advantage. It should just be WAY harder to achieve. I mean, any homebrew that offers advantage to a roll should be hard to achieve.
You know, there is a way to make it ... And it was allready mentioned on this forum, funny how fast we forget about such posts ...
Im not sure if i remember it corectly, so maybe original suggestion was a little different ... if you want source, you have to find it yourself, im too lazy for that. :P
Anyway ... The suggestion was that enemies, should turn around to face EVERY meele attack, unless: A) Target have no idea about attack (wich would mean attacking from hiding, invisibility, maybe in same turn as you misty step, maybe inside Darkness, or maybe when Blinded etc.) ... to put it simply when surprised. B) Target is allready threatened by another PC in meele range, and therefore turning to one would simply mean expose its back to another ...
In shorten version: They would act just like characters in Heroes of Might and Magic do.
I would like to just say that its not my suggestion and reapeat that maybe i remembered it wrong ... but main structure should be (i hope) intact. Anyway, personaly i would support it imediatly, since i really like the idea.
I still dont understand why cant we change Race for our hirelings. Lets us play Githyanki as racist as they trully are!