I think some people probably don't like it because sniper rifles are so dominant on it
Are you kidding me? If your getting sniped on Bloc then your doing something wrong. I can't even think of the last time a sniper killed me on Bloc, its the worst level to snipe on. I just run around executing snipers who are prone and crouched. Yes, I take the time to pull my pistol out and double tap them in the back of the head, I do it so when they watch the kill cam they feel like a total tard for sniping on that map in the first place.
For TDM I'll do nothing but snipe
For Domination/HQ it's a toss up between sniping or running silenced SMG