I don't feel like I'm lacking choice. Sure, not as many craft breweries do lagers or English ales, but I can find them if I want them.
If anything, it's the explosion in number of craft breweries that exist today that forced large national ones like Bell's, New Belgium, etc to rethink their model. I see about 50-75% of shelf space at a good beer store taken by local or regional craft breweries. Add in dozens of brewpubs, taprooms, and farm breweries within driving distance, and the model of selling Two Hearted or Fat Tire on both cost in mass quantities doesn't hold up anymore. Especially after a lot of the big craft breweries expanded (often too quickly) with second locations. So, they might be chasing trends and mas market appeal, but that doesn't mean it's as bad as seeing BMC as the only options.