The "fight" Santorum brought would've been on the wrong battlefield and made things even worse.
I've said for years it was unlikely anyone would beat Obama because of the "historical nature" of his presidency. Romney did a fine job but considering the factors outside of his control including an electorate that still blames Bush for the economy, no Republican was likely to win against a personally popular incumbent.
That said, I'd have liked to have seen ORCA actually work. I doubt we'll see an investigation into whether the anarchists Anonymous really did sabotage it as they claimed.
Since you're prognosticating, have you picked someone for 2016?
Older, "rich", white, northeastern, liberal. The G.O.P.e. have not told me his name yet.