On paper this offense looks ridiculous. Brady is comfortable and has had a full year or more with each of his receivers, Chander as TE2 makes Gronk that much more dangerous, etc etc. I think the Chandler signing, too, makes a potential Gronk injury (please god no) a little more bearable. He's the most dangerous weapon in the NFL, period, but if he goes down they'd at least have a dual-threat TE to step in, rather than choosing between Hooman and Wright.
But I'll also say, RB worries me just a bit. Not much, but a bit. If Blount goes down that RB corp is pretty thin/inexperienced. I think they can survive, but if we're talking about a scorched earth, 'best ever' type of offense the RB position is what worries me.