I dont think this is as good as you think. The problem with 5 WR set is that there is no "disguise" play. When we have a 2/2/1 personnel, the defense needs to be ready for anything, runs, passes, play actions.
On a empty backfield 5 wr set, is always going to be a pass. Plus, on those kind of sets, we have to rely very heavily on individual skills of our receivers and, besides Edelman, i would say we dont have an excellent receiver (yet, at least)
There's a reason BB has been searching for a second TE to match up with Gronk for year and not going after WRs in FA.