EA hasn't dedicated themselves to hardware for their series ports since the PS2 arrived, shortly after the GC and Xbox hit they ported on a large scale to those systems as well.

Strong enough is subjective, the dev cost is extremely high and it's a high risk thing to just dump something out there hoping it does well enough in returns. In cases of exclusivity the console maker gives the 3rd party incentive to keep their product in their house. Sony has the chance to do this but their current financial model doesn't allow it right now.

Basically their response to "you're not giving enough support" is "well compensate us and we'll give you something exclusive, otherwise we're going to pimp out our games like everyone else"

Their port work could use help but honestly it's surprising they have as high of a success rate as they do for titles given that EA has used a generic wrapper system for quite a long time now where the original code is wrapped for each platform, although I doubt they're still doing it for all platforms now since most engine work for the Wii seems to ride on the PS2 platform design creating two engines and two wrapper systems.