I would agree that Nintendo is lowering the quality of their games, but not the titles listed in the OP. Heck, even the quality in Amiibo Festival is great. The issue with that game is the gameplay, which is severely lacking. Likely none of these games were even rushed.
Having played Wooly World, that is not one lacking quality, but quite the opposite. The presentation is quite excellent in that game, and it's fun. I can't say anything on the other titles, as I have not played them, but I would disagree with the games listed overall.
I'd say Pikmin 3DS, Wooly World 3DS, Mario Party Star Rush and Ultra Smash are the ones guilty of being low quality rushed games.
Dance my pretties!
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