The thing is, you've even decreased the number of DoS necessary to send your 10 rounds in one guy...
One full auto = 9 DoS necessary to send him to oblivion. Hard to get, but not impossible when you've spent all your XP in BS and BS-enhancing bull$h1t
Two "semi autos" = only 8 DoS needed...'Cause 4 mean that the guy eats the 5 rounds. Hell yeah.
If you go down so as to give your Dev the option to fire two "semi full auto bursts" then just make that semi-auto bursts and consider he's got the right to shoot two semi-autos. It'll be much less broken, with the 1 hit / 2 DoS rule...
But then you've authorized him something no one is allowed to do : attacking twice, using the same action twice, whatever you call it : two "semi-auto bursts" (yeah, cause clearly for me, shooting at RoF/2 for half the bonus is called a semi-auto...).