If we do end up signing Pierce, people will make it into a Diggs replacement because that was our highest paid and best statistical receiver last year. In reality though, Diggs was our #3 WR in terms of playing time. Boutte and Hollins played more. So rather than a replacement for Diggs, Pierce would actually be more of an upgrade over Hollins and take his playing time. Or I guess you could look at it as he takes Boutte's role as the go-to downfield/outside/X receiver and then Boutte/Hollins/Williams/Douglas/Chism battle it out to take the roles that Hollins and Diggs played last year. You'd really be changing the makeup of the WR room.
Personally, I love the idea of Boutte playing more of a flanker/slot role and Williams hopefully stepping up into that rotation as well. Hollins, Chism, Douglas are all limited players that should be #4 or lower on the depth chart IMO and used in packages. But I think Pierce/Boutte/KWilliams could be a really dynamic 3 WR set. All have an ability to make plays downfield which plays to Maye's strengths. Add a good move TE with some YAC ability and then I think you can be very diverse on offense.