I don't know, bigs are hard to come by and A'mare literally can play alongside almost anyone. I mean he was doing pretty well with Shaq on his back in pheonix. And Howard is far more athletic and agile than O'neal...
Spacing might be an issue yes but I can't see any reason why howard couldn't adjust his game. And I mean, its not like Orlando literally hands him the opporotunity to be an offensive threat, the guy cleans up better than most in the nba today.
Though there are obvious flaws in the plan, namely Cap space along with the new CBA rules(which I'm not throughly familiar with yet but I get the gist of it). And well, I wonder how well he'll adjust in a system with two offensive anchors on the team, I mean Turk & Rashard are nice but they're no Melo & A'mare...
Still, it is a fun little thought.