He is the most influential guy in gaming ever, but yeah, Nintendo should have at least some games that explore stories. Them doing Eternal Darkness was the direction I wanted Nintendo to go. But their offer in the last years or even decades is just not for me anymore.
Gameplay is kinda explored enough already in all varieties, "new" stuff hardly feels fresh and actually new again, just like MP, it gets stale. Outside of racing games, I need stories and proper characters. Does not even matter that most stories and characters in gaming on average kinda suck. Still better than having no investment in the background at all.
I guess he personally isn't stopping Nintendo to evolve, but Nintendo as a whole doesn't want to let go of what was good in the past and just moves very slow and acts conservative.