Not really, Nintendo uses their properties at a much lower rate than other companies do because they have so many successful franchises. Most of the people I see who complain about Nintendo releasing versions of their franchises too often are the same as those who are fans of companies who release versions of their key franchises on an annual basis; much more frequently than Nintendo.

Also you are acting like Nintendo didn't create multiple new franchises (and to outstanding success: Wii Sports, Brain Age, Nintendogs, Wii Fit) and popularized multiple genres (Fitness games in particular) that had never been popular before.

Yes. But I would really appreciate if they overused them some more.

They do seem to be expanding production capacity in their recent reshuffling (the one that includes Miyamoto retiring as general manager of EAD production and moving over to directly manage smaller teams), so here's hoping.