Yeah, to think that Flacco would play better with better weapons is a tad naive to me. He's not showing anything close to remotely consistent mechanics and his ball placement is spotty at best.
And the thing is- these are good weapons. Alex Collins is like second in the league for YPC, Maclin was a HUGE signing, Wallace was a 1,000 yard receiver a year ago, and Woodhead is one of the best pass catching backs in the league. Even Allen and Watson play pretty good complementary roles.
I've said it before and I'll say it again- people would be unhappy with Megatron, Rice, and Owens with how Flacco is currently playing.