I wouldn't mind expanding into niches if BMW worked to preserve it's driving base. If they could dial back in everything that put them in their current position, then the more the merrier. But until the 3er drives like a 3er (I shouldn't have to spend money on restricted lines and mandatory electronic dampers and still always have to press a button to get the closest setting to "BMW" feel) and they stop just chasing sales, I don't agree with more and more.
When they make each core model the Ultimate Driving Machine again, then they can proliferate for the masses.
-2012 BMW 328i (E91): Tasman Green, Oyster Leather, Premium & Sport, 6-speed Auto; 6/26/2012-
-2006 BMW 325i (E90): Arctic, Grey Leather, Premium, 6-speed Auto; 7/2009 - 5/2012
-2004 MINI Cooper (R50): Indi Blue w/White Top, Black Leatherette, Cold Weather, 5-speed Manual; 1/2/2004