Good ports from X360 to Wii U are too complicated and expensive. Third parties would only do them with Wii sales numbers. I don't blame them for this because it would be stupid to put as much effort to it like they do with PS3 ports if it only sells 100-200k.
But don't judge Wii U's hardware capabilities by multiplats.
The Wii U CPU has to do all the tasks the X360 CPU does. I don't think they use the GPGPU for physics and AI or the separate audio DSP.
Most Wanted U is the only 3rd party game that profits from the bigger RAM.
Not sure if they even use the eDRAM (X1 has a similar problem).








