You actually have a really good point there. The odds were stacked against him yet he did make it a top selling book (was it really Marvel's top book?). I never thought about him not being involved in AxX and his exclusion does seem odd given he was writing the flagship title of one of the two franchises. Maybe he's done something to piss off Brevoort (like write a positive story about Cyclops). What seems even more mad is that they then replace Gillen with the guy who was writing Avengers.
I'm sure the paychecks are good but Gillen takes a lot of shit while doing so. If he was at DC he'd be regarded as Snyder good (unless he was Gail Simone). It reminds me of what Paul Cornell said wrt Gail's firing (and between the lines his own treatment at DC) about there needing to be some kind of comic writers union where there should be some kind of compensation if you are fired from a title that has increased in sales while you're writing it.
Greg Land was highly regarded back when he was doing Sojourn for crossgen. Maybe the guy spends a lot of time looking at porn on the net and he figured it is an efficient use of his job? Worse ways of making a living, I guess. Is he that fast though? He seems to have spent the last few years doing a couple of issues on multi-artist titles.
The LAAAND page is quite funny. It also shows how Larocca can sometimes fall prey to photoshop fever in an even lazier style. On the brightside his Cable and X-force pages suggest he's going back to drawing his own stuff again.