Really, out of all the games he's been involved with, that's the one you're going to bring up?
I mean, look at how many attractions Universal has made based on films from the guy who made 1941! It's ridiculous!
Nintendo is a huge get for Universal, they're protective of their properties after the awful SMB film, and I'm sure everything will be fine. How will the Kart ride work, especially if it is more physical based than screen? I don't know, I'm not a designer or engineer. But Universal has done great in the past when working closely with someone on an IP, so I have no reason to doubt them now, even if F&F sounds bad.
And who cares how the temporary stage for the groundbreaking looks, it's not like they're going to invest a ton of money or R&D into a fantastic stage that they only need for a few minutes.
It's kind of hard to be so negative about something many people love though when you hardly know the details of what it will be and it's still 3-4 years out.