So, you wouldn't include Scott Brown either?
I don't see how they're even slightly comparable.
Brown's played in 33 games this season, including internationals and the champions league thru to and including the last 16.
Faddy's made a dozen appearances for motherwell, all in SPL matches and other than that has barely kicked a ball in 3 years.
While Brown's been out recently, he's back match fit and is still mentally attuned to playing at the highest level because that what he's been doing this season and for the last 6 years. Faddy, much as I love him, is not.
You'd also have to consider who can replace them. For Faddy we have Snodgrass, Morrison, Maloney, Forrest, GMS, Burke and Adam who are all capable in his positions, and most of whom are performing well at a higher level. We don't _need_ Faddy for this game. In Browns position however, we have McArthur.. and that's about it. We do need Brown.. pretty much in every game at the moment, there is no comparable alternative that someone else provides.