in other words
GIT GUD CASUAL!
many people told nintendo this a good while ago, they couldve saved themselves the whole WiiU debacle!
the problem is not casual games themselves, but they shouldnt focus too much on those, release a few of those here and there, but you should count on them to sustain your company in the long run
in the end while less in number, your hardcore players are arguably your most important fans, they are your tech priests, converting people to your console, they probide the most useful feedback, they make promotional material for you for free