Every M car was a new idea at some point. Even the M3. And someone who owned an E30 M3 would probably joke about how even an E92 M3 is watered down it compared to its predecessors.
I have many more problems with an X6 being designated an M model than I do about a lighter car with a shorter wheel base such as the 1M being called an M car.
that being said, I wouldn't buy one. I'd get an M3. It's way better looking.