Christian,what was he doing before he left?Feuding for the Legend's title.What side was he on,neither.And that was the way I liked it.I liked him as the "renegade", as you put it,the guy who isn't on either Team,the lone wolf who looks on as two teams fight to the death,ultimately one,or both,are left broken.And then he comes in and sweeps up.That would have been ideal for him,he thinks he's too good for both sides,establishes himself as a tweener,and takes them both on.
But when he faced Booker for the title at Turning Point,he lost.The stipulation of said match was if Christian lost,he would be forced to join the Mafia.But he was thrown out for being rumored to jump ship.So I say to you,if Christian hadn't left,he would,sorry should,have been in the mafia.But unwillingly.They could even pull a samoa joe and pay him off.He could even end up joining the frontline.
But what do I really think,what do I believe would have happened if he stayed.2 words come to mind,"midcard obscurity".See,he was a main eventer untill Scott D'amore,his rumored biggest backer on creative, left.Nobody really thought he was maine event material afterwards.So I do believe he would just end up as an upper mid carder,or engaged in random feuds.