Maybe. I have to admit that it's a toss up if I'd actually play the Infantry tree. Mostly because if I was going to start microing a certain amount of units I just say "Fuck it, might as well play Ladder!" Just like with the Field Engineer. Only real worry that comes to mind though is how it'd mess with marine XP. Just the pattern so far has been that any minion unit of a Marine doesn't give out shared XP or anything. Considering there isn't the 1-1 Active to Cooldown sort of thing going on anymore it becomes more of a worry, like back when it was something like a 30 second duration to a 35 second recharge on the skill.