M135i isn't a true M-car, and was not intended to be, and I do agree about the M badge being watered down.
In the 60's and 70's the BMW's ran circles around almost any car without any other badge than the blue-white propeller.
Still I give BMW credit for making cars that outperform it's competitors. Only they should do it without the M. It's in the genes.
"Never a boring car"
Some X'es: BMW Z3 2.8, DeTomaso Pantera, Porsche 928s, BMW 732i, BMW 323i, BMW 2002