Yo keep quiet, I don't want this "Feature" getting "Fixed" lol. Honestly though, this makes the perk way more viable. The robots you hack don't regenerate health, so even if you get a Sentrybot on your team, it ain't sticking around forever. Besides, you need to be level 48 to get the third level of the perk, which is pretty late into the game anyways, and with Automaton, the robots you make are more than likely going to be better than anything you can hack anyways.
Really the only time I've used the distance hacking in the wild was to turn Gunner's Assaultrons against them or shut down a robot I didn't feel like fighting. I wouldn't even say its overpowered in the DLC, as there's like a 3 second animation before you even connect to the robot, which makes you a sitting duck. (I've died a few times like this), and when you get to the Mechanist's base
Spoiler Hacking the robots only causes them to self destruct, which I found to be more dangerous to me than anything.
Though, if you want unique robot companions, Takahashi (Power Noodle robot), First Mate (police protectron on the USS Constitution), and KL-E-0 (Assaultron shop owner in Goodneighbor), are all hackable and have regenerating health (but can die, so careful with your grenades and mini nukes). To dismiss them, just hack another robot, and they'll return to their shop/ship.