I don't think this debate is that profound. I think Viva has it pretty much right. At this point I'd say there's about as much chance of Morrissey playing with Alain again as there is of Johnny playing with him again. Well, almost.
I think if Alain was asked back he'd come back in a heartbeat (or I hope he would) but for some reason known only to Morrissey, that spot is filled by Jesse. But I agree with Viva that the reason Whyte's songs are still accepted are that they are, simply, the best songs. I mean, in this construct, Alain is at least making some money selling the songs, even if he is not allowed to play them or record them. He's not a stupid guy.
I admittedly have no proof whatsoever as to the dynamics of the group, but it seems like there is definitely some kind of unbridgeable gap now. What or why, I don't claim to know, but I think you'd have to be either high or retarded to think Alain will be anything other than peripherally involved in the band anymore, as a writer.
And that sucks, because he is a great guy and a great talent and Tobias...is not.