I rate Nintendo's 2015 7/10 :
Good games were delivered such as Yoshi's Wolly World and Kirby and the Rainbow course;
Amazing games were there too such as SMM, Splatoon and now Xenoblade X;
buuuuuut:
1-I found the 3DS library pretty weak (for my personal appeal at least) ;
2-Too many delays: Yo-kai Watch, Xenoblade, StarFox, Zelda and others;
3-Nintendo doesn't listen to us (Amiibo Festival);
4-Nintendo wanted to piss us off (Metroid Prime; Federation Force).
Now thinking about it a 6 might have been more appropriated but since they probably couldn't handle everything properly due to Iwata's passing I'll give them a pass...