Im yet to find a full on metalcore band that doesn't make me want to cry. I saw an awful metalcore/screamo band the other week in Townsville by the name of The Moors Murders. Absolutey terrible.
to me a touring version of M4TB just doesn't seem right. If you wanna see it you have to go to Canberra. There is only one M4TB and only one location if you know what I mean...
I agree with Matt about the touring aspect. It was worth a try though. As for the "extreme" end, I don't think it will be at the expense of variety. For the metalcore aspect, I wouldn't mind seeing The Daylight Curse play.