Look until we got Stills I was all about keeping Wallace one more year, but at this point, Stills gives this offense the only thing I really thought we needed Wallace for, an option to stretch the field. Given Tannehill's struggles throwing deep, having two guys with that skill set doesn't really make sense.
Clay on the other hand, paired with Cameron, Landry and Stills on the outside, Miller in the backfield, is a balanced formation we can run or pass out of successfully with consistency, it's tough to match up with that as a defense too due to the versatility.
Don't sleep on the 3 TE 1 RB 1 WR sets either, devastating run and PA package, the ability to split either Clay, Cameron or both out wide will catch some defenses with their pants down.
Very similar to what Pats do in their hurry up, by getting creative with packages and using versatile players like Charles "the Human Swiss Army Knife" Clay to give DC's fits