I cant complain much about the way it is. Its a rather fast game so making it a slower process (in any way, be it a short puzzle, a QTE or the character having to perform any kind of action that would take longer) wouldnt really help much.
This here is basicly the other extreme where it works as it complements the rest of the game design since in it self its a much slower paced game.
I really dont feel that the hacking is a problem in Watch Dogs, it could however have a bit more variety and have less direct results. For example, hacking one thing alone doesnt make much of a difference but the combination of some different hacks create one very unique outcome. Even the more direct stuff could have been pushed a lot further with disabling lights and turning on/off a wider variety of eletrical devices.