So, the Aim weighting for a Dread Guard geared gunnery commando is nearly double the weighting of Power.
I *really* doubt that. I'd be quite curious to see how you arrived at that conclusion (or who told you that). The DR curves on crit make it almost pointless to use more than the "standard" amount, and the crit contributions of primary stat aren't so massive they they completely supplant Power. Most calcs I've seen weigh Aim at roughly 1.1-1.2 times the value of Power, at worst.