I think the thing most holding back the Rebels in the last two years has been their insistence to play To'omua at 10. Even last year when they played Deagan at 10 they looked so much sharper in attack - obviously Deagan isn't a very good flyhalf, but he is a flyhalf, To'omua just can't get a backline humming like a flyhalf. With that said it baffles me that the Rebels would go to the lengths of louring Carter Gordon away from the Reds (apparently promising more playing time) and then never play him.
I think now with nothing to lose they've really gotta play Gordon at 10, move To'omua to his natural 12.
I've always assumed it's been a demand from To'omua to play at 10, or the board/management insisting he has to 'our star player has to play the star position'. If it's Wessels' insistence then I think he ought to go. He's had long enough, that year he had Genia and Qaude they should have been one of the top teams and I don't think they even made the finals IIRC. He's had long enough and they've just always been a bit average despite often having one of the best lists in the country.
Also one key different between say Thorn and Wessels, while yes Thorn has generational talent, don't forget he built that talent. Wessels has had even more U20's/Australian Schoolboys etc he had access to the same NRC program (although to be fair only one team). What has he got to show from it, Hodge ... maybe Hosea, Uelese?, Leota? Even if you take Tupou out of Thorn's credit he's been directly responsible for Tuttle, Stewart, ASY (Angus Scott-Young), LSL (Lukhan Salakaia-Loto), McReight, Uru, Flook, Daugunu.