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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.
