Dual wielding 2 auto fire weapons mechanically only makes scoring hits harder due to the additional Difficulty die added to the dice pool and doesn't increase hits in anyway. Dual wielding a pair of pistolized single shot rifles really isn't all that big a deal, a pair of tricked out H7s is probably better anyway.
I think I may have rambled there, but we don't disagree. What I meant to say that dual wielding two blaster carbines (damage 9) and getting at most two hits is mechanically less powerful than the heavy blaster rifle (damage 10) with full auto and the ability to generate more than two hits.
I agree that a pair of tricked out heavy blasters would make more sense (mechanically and sanity-check-wise).