You might criticize an occasional Nintendo game, but you give them the benefit of a doubt. Not with Ubisoft. Concept of being proud of never playing Ubisoft games (like you see in this thread) doesn't exist with Nintendo games either.
Btw I never said Shadows will be great. Just said to wait and see.
I don't give Nintendo benefit of the doubt and the main reason I didn't pick up M&L was they have been bad for over 10 years. Same with Zelda games until BotW. Same with Kirby until Forgotten Land. There's tons of franchises they've let become mediocre and I won't buy the games unless the reception from gamers (not journalists) is overwhelmingly positive.
And even if I did, you give Ubisoft benefit of the doubt, otherwise you wouldn't be constantly propping up a company that has been churning out horrible product since the start of the decade and now they are on the verge of bankruptcy. Difference is Nintendo aren't going out of business and Ubisoft are. I think giving benefit of the doubt to the company that isn't bankrupt is more logical.