The heavier spring will no doubt make the pull heavier, butwould also very likely reduce the creep. If I wasn't already so busy, I'd have half a notion to put together a redesign of the Genesis trigger. Maybe market it through Brownell's. These type of guns have really simple triggers - compared to a something like a semi-auto. Maybe something like a replacement hammer and trigger, with independent springs and a set screw to control sear engagement.

My Black Diamonds, for all their design shortcomings, have great triggers.