Bit before my time, and I don't know his contract situation, but Brewster has been (and presumably still is) the highest paid player in the club for the past 3 years and still has another 2 years to go.
He's had ample opportunity to contribute to games in a meaningful way but has only mustered 4 league goals in 57 appearances. His presence in the squad is actively sapping valuable resources from potential improvements we could be making and the squad as a whole is weaker because our highest paid player is a complete non-entity.
I'd like to think that with how much sports science has come in the past few decades that John Ebbrell would have just failed his medical outright before even signing for us if it was to happen today. (But who knows with us, we seem to be an injury factory at times).