Certainly preferable to shift him out, and he hasn't done well on loan so any sale deal will probably be the least worst option.
I'm no medic but he's not looked good for 2 years with his knees. Remember Sandro, ? Similar looking problem ?
Question is whether he can play again at a high PL level - and whilst he played a few games last season, the answer seemed to be a resounding 'no' .
He's been on his 3 week break since AFCON back next week, so suspect he an Poch will have a chat after a days training/medical check up.
But basis issue will be that if Wanyama is fit ( but personally doubt it,) who else goes if we want others iin - the ever injured Lamela ? Or do we not want/need any more non HG players