+10% blanket increase for SG isn't what I'd suggest, things like Pistol's power level are fine as far as I'm concearned - if anything perhaps an increase in the amount of crippled arms to encourage bringing a pistol along as a back-up weapon is all thats needed.
Assault rifle class rifles, possibly an increase to single shot range for some of them - these (and sniper style rifles) would then be reasonable as far as I'm concearned, especially with a slight bumping up of some targetted shots. Having them as able to hit from out of range with the ability to strategically target enemies would be much better than simply normalising DPS over all weapon types.
SMG/P90 seem fine to me from the numbers I have on them, but Shotguns could indeed do with a bump to their power, either in raw damage terms, weapon traits or ammo types - I would really dislike them gaining range as it would also be a step towards normalising all weapons. Greese/Tommy, not sure, pretty much just a flavour weapon at the moment I guess - so long as they form some kind of mid point between 10mm and p90's its not too bad.