It's simple. If third parties produced inferior content for the system then I'll just purchase exclusives with my hard earned money until I see it fit to purchase third party multiplat games. I don't fault Wii U owners for skipping over games that are either sub par or extremely old ports (and in some cases both).
However, a game like COD BO2 on the Wii U is fair game in my opinion. I don't find AC3 is a horrible addition either. I have a few games on PS3 that don't run as smoothly as the X360 versions, but they were good enough to encourage a purchase.
Playstation = The Beast from the East
Sony + Nintendo = WIN! PS3 + PSV + PS4 + Wii U + 3DS