I guess if MM and MA weren't getting along then this is the right thing to do, however well/badly (delete as you see fit) you think MA was doing. Presumably things would only have got worse, and at least by making the decision now it stops what could have a disasterous slide into chaos (or more chaos than already seems to be occurring).
It seems to me that MA wants to be a manager without interference from above (which is no bad thing), but MM also wants to be the manager. MM might as well appoint himself as manager. But instead I suspect he'll go for somebody like Glenn Roeder, who looks like he'd say yes to anything or anybody. I know Warnock is a tit, but I can't see him putting up with being told what to do by MM. The same goes for Paul Jewell and a number of the other names being touted about.
It may have been mentioned on another thread somewhere (I haven't got round to reading them all yet, there's too much going on at LCFC to keep up!) but I wouldn't be surprised if stories, true or otherwise, come out about MA pissing off a few of the players, thus leading to the inevitable "he's lost the dressing room" quotes.
I know we're turning into a bit of a pantomime at the moment, and there could be some serious repercussions somewhere along the line if things go badly tits up, but the whole thing's quite good fun really isn't it? We've not had so much to talk about for years. It might be worth getting in touch with supporters of Hearts to see how they deal with having a lunatic in charge.