Watch Da Birdie
I buy cakes for myself on my birthday it's not weird lots of people do it I bet
But another Mario and peach is silly, imo, since this time it's just them in different clothes, at least the metal varients seemed like doppelgangers or something. I would've rather seen Birdo and Nabbit in their place. Another guy and girl midweight character, a vet returning and a newcomer from a recent game
Nabbit being in this game is the biggest omission, imo. Well, him and Bowser Jr., but he got Smash. Dude's already playable in a mainline Mario (er...Luigi) title by his second appearance, he deserves to be in Mario Kart. King Boo is another weird omission since it'd go perfect since LM2 just came out.
Not sure why people are so opposed to the series opening up to non-Mario franchises. The track design possibilities seem wonderfully endless if they were to do so.
Mario Kart 8 did some awesome course-work with areas completely made up from thin air, and I think some people just like the simplicity of it being Mario-only. I can understand people being apprehensive about messing with the formula.
I think the best option would be for Nintendo to evenly split it, make half the characters and courses Mario and Mario Kart-style locations, while the other half are guest characters, and Nintendo-themed courses. And stick to the Nintendo characters that don't feel as off when paired with Mario in a Mario-centric game. Link? OK, more so if it was Toon Link though honestly. But I think it'd be weird seeing Captain Falcon or Marth appear in-person as a driver.