Look at Torres for an example, did really well at Liverpool but struggled at Chelsea. Did he turn into a bad player or did Liverpool suit him better and therefore he was able to deliver more. Maybe whilst at Palace he was the equivalent of Torres for Liverpool and had he stayed with us, he could have been like Torres at Chelsea for us. - Some players do well at one club and struggle at another for no obvious reason.
Besides, had he stayed and performed badly like he did in his first season in the Championship at Palace, how many would have turned on him and tried to force him out like they have done with so many of our players in the past.
You can't say for sure whether he would have had the same sort of impact and success had he stayed with us as he did with Palace as there are too many variables involved to ever be sure.
Thats seems a desperate post.
The form GM was in for us that year - he would of been banging them in for any half decent team , if you'd managed to keep him, you'd may well be a Premier League team.