Our 3 top WR's are 30, 28 and 23. They did very, very well last year.
Belichick always looks for WR additions upgrades.
This year, we need a 4th WR, likely to be Amendola or another veteran (could be Floyd). We also are always adding youngsters. After all Edelman just passed 30.
There is nothing unusual about the patriots looking for a WR. HOWEVER, I don't see them paying huge money for a 4th WR, when they have 3 solid WR's.
And yes, Belichick likes to have 7 or so potential roster players at WR in camp.