Shotguns are weird sometimes though i wouldn't call them useless. Mostly the inconsistency of doing long range (headshot) kills one time and inability to make 1m kills the other time. MAg7 is also very incosistent, sometimes it makes instant headshot kills, sometimes it doesn't. usually when i carry it... Sawed off has a broken reload animation which adds stupid delay between pressing reload and actually doing it. In most cases i pick the automatic one which trades power for shooting and reloading speed.
Despite raging me quite some times since release, CS:GO plays much better than CS:S, i just wish there were more maps. Constantly playing just Office and Italy is getting a bit boring.
I miss my daily dose of Militia, Assault, Compound, Cbble. I also miss MP5, silencers and other tiny things we already had in CS:S but are gone now. But new maps are imo top priority, i can live without everything else, but having this few maps is very annoying.