You can only pull a -9 twice due to cumulative recoil though, after that you're not hitting anyone.
In 5e yes, But what you do is get an initiative score that should be in the 20s, (like 10 or 11 and three d6) full burst, then spend your next action just aiming then full burst again on your third action since the aiming gave you a chance to reset your progressive recoil.
At least until more fancy recoil nullifies (like foot anchors) come out. Possibly also spend that middle action to launch/roll a grenade at somebody you really don't like since I know throwing (but not sure about launching) a grenade would reset your recoil.
(Also you can do two long bursts with some aiming as simple actions on your first and second actions if you expect the fight to end in the first to go rounds before you get to your third)
But in my opinion that is neither here nor there in my thoughts how likely you are to hit versus how hard do you hit in 5e versus 4e in my opinion.