Whether we fans think he should stay or go is irrelevant, it all comes down to what Benni thinks. And at the moment (and some fans don't want to see what is staring them right in the face) Benni is clearly not putting in 100%, which suggests he isn't entirely happy. It's an amazing coincidence that his sulking has started again very close to the opening of the transfer window.
And, like it or not, Celtic and Rangers are bigger than us and I think he would be very tempted at the chance of playing for either of them in the Champions League.
For what it's worth I hope he stays, but I don't hold out too much hope at the moment.