I would suggest that he would want regular football and not just a bit part as plan B.
Griff can play wide (and thus can slot into the system) where as Simon is a classical striker. He just doesn't fit the system Ernie is playing IMHO. Can't see it happening at the Nix.
Citeh on the other hand would be a potential fit as a backup to Kennedy but then you would have two persistently injured strikers on the books. Also, as mentioned, can't see Simon wanting to be a backup too much. But maybe I am wrong on that.
I would also gamble that he would actually be the most underrated hated footballer in the HAL. He is agro and many a folk have tried to knock him out.