I'm really split on this. On one hand, I want the M3 to be focused and more "hardcore". On the other hand, one of the best things about the M3 (sedan) to me was that it was one of the best ALL around cars which made it hugely enjoyable 100% of the time. I could go fast, I could carry people, I could carry stuff.
AWD has a legitimate place in the sports car arena.
If BMW could make an AWD M that truly kicked ass and set the benchmark for an AWD sports car, I'd support it. Otherwise, I guess it feels like dancing along to Audi's fiddle.