im pretty sure EA explained why they werent supporting WIi U. Something along the lines that it wasnt selling well, which no one could argue at the time or even now

EA games never really have sold that great on Nintendo platforms like ever.

Maybe like back during the SNES day, but even then they sold better on the Genesis.

Even when Nintendo teamed up with EA to put Mario and Luigi and other characters into games like NBA Street and SSX, the sales were mediocre.

I think they did make some Wii exclusive games like Boom Blox, that WM+ tennis game, and EA Active ... but sales of those games declined massively as the Wii got on in age. Madden NFL was never really that big of a hit on the Wii neither was NHL or FIFA.

There's no indication that "port parity" really makes much/any difference with Wii U games anyway. Need For Speed was a good port, but that still flopped, Call of Duty and Assassin's Creed IV were OK, those still sold like crap too. The Wii U can't even sell things like Just Dance. 

Ultimately though it's up to the platform maker to make their platform attractive and workable for third parties, not the other way around. That's like the guy who's bitter at women and thinks women should come up to him and talk to him when he makes no effort to approach anyone, be social, or improve his appearance or life standing. 

This could be a good thing to be honest. This forces Nintendo to fully realize the potential of their console. The N64's library may not have been as varied or vast as the PS1s but it still managed to craft it's own identity. Nintey just needs the software to carve their own niche.

Is Project Cars still coming to Wii U?

It's still listed on the developer's website, but only PS4 & XB1 versions are up for preorder it seems.

ill go so far as saying that 3rd party games dont do that well on Wii U period. No matter who it came from. One would argue that Lego City and Zombi U did ok, But they both were bundled and in the case of Lego City the 3ds still killed it. and Zombi U should have sold way better for a launch game that got bundled and advertised.  Hell the 2nd party stuff doesnt even seem to sell (looking at you W101 or is that 1st) the parity thing is just an excuse people came up with to avoid admitting that the audience for the WIi U simply dont care for those games or they rather play them on another system. PS3 intially had terrible versions of multiplat games and sometimes they were evne late, funny enough they still managed to sell well. 

I think Ultra Street Fighter IV could have sold well, Street Fighter IV for 3DS sold over 1 million units, It in in the top 10 of best selling Street Fighter games. By well I mean Monster Hunter for Wii U numbers.
The virtual console has all the SNES Street Fighter games, and the older owners of Wii U who owned a SNES as a kid would be tempted to get it.

Even Tatsunoko vs Capcom for Wii sold well even though no one know what Tatsunoko is in the west.

there was no way Capcom was going to rewrite the code to get it up and running on Wii U for what is essentially an expansion pack. No way. It would not have done the numbers to justify it.

Yet the console is selling better than the Xbox One.

How long until Microsoft loses all support?

They would not need to rewrite the code as such. The game is on Xbox 360, and porting to Wii U from that is relatively simple.

But 3rd party games still sell well on Xbox despite the low hardware sales