Ideally when you activate a super, it’s done and the opponent loses life. With Sieze or Strike, you have to activate then find an opening. This is much more complex and risky than simply decking the opponent with a non-retarted super.
Unlike Urien, Q cannot even use the pause of activation to sneak in another dash punch because he sits there for about 1 second after the super flash.
Despite being the best player in the game, Q cannot afford to take the risks necessary for the lackluster dog barf that is SA 3.
Sounds like you’ve been theoryfightering too much. Go to an arcade and play humans.