I have to say I agree. The problem with the reasoning that "more choice is always better" is that the curve drops after a certain number of choices and in fact, the total net result may even be negative after a point. That's the intuitive and empirically confirmed phenomenon called "Choice Paralysis" (quick google search result). You don't want to be overwhelmed with choices when making a decision... the magic number where there is added value in choice is somewhere between 3 and 7. How many new acronyms will BMW offer by 2015? 
Also, keep in mind that new market segments have a tendancy to dillute a company's focus. If BMW was about sporty cars, just how does that value translate to mini vans? Where's the synergy in that vision? I'm not talking about synergy from an accountant's view (who's mantra is more parts sharing -> greater economies of scale), but from product design view.
Also, keep in mind that new market segments have a tendancy to dillute a company's focus. If BMW was about sporty cars, just how does that value translate to mini vans? Where's the synergy in that vision? I'm not talking about synergy from an accountant's view (who's mantra is more parts sharing -> greater economies of scale), but from product design view.