I have no objections to spoilers... and it sounds like they created another character who has chemistry with everyone. I definitely can't wait to reach him. It's the main reason, Will is my favorite character since he has chemistry with everyone... except for the one they keep trying to ship him with.
I'm all for frenemies as well. It's why I lament the fact that they killed Watson off in season one because him and John had that former friends turned enemies vibe going... and I want more of that back story.