The backstab thing is another weird one really. I know it's "turn-based" but it's still supposed to reflect a fight happening, and no enemy would let you "circle them" to "backstab them". I much prefer having an ally close to the enemy giving you the ability to sneak attack, and that's it. Swashbucklers and Inquisitives are subclasses that can get sneak attack without having to have an ally close or having an advantage.
