The thing is... you shouldn't be constantly getting into a situation where backstab/sneak attack is possible, since the enemy is assumed to follow your movements/positioning unless distracted by someone else (flanking) or completely unaware of you. That's also why disengage and hide absolutely have to be actions instead of bonus actions.
I agree with this. As it is, why not get the backstab when possible? And make use of the jump disengage. But it's something they should change so that it's not so easy to get everywhere during combat with any class. That's a pretty big balance adjustment and I'm sure they would balance other aspects accordingly such that they aren't just making melee or the game in general harder