There was a series of videos on YouTube a while back of Eric (being interviewed by some random guy) where he spent a lot of time airing out Jane's dirty laundry around the NINJA and 2.0 tours and the recording sessions with Trent.
The gist of it, as I remember it, was that they butted heads with Perry over ideas, Perry didn't want the band to make music without him there, Dave and Steve sorta just fell in line and didn't rock the boat, Trent tried to have a talk with Perry and that didn't go well either. Hence why the NINJA sampler only had 2 old rerecorded songs, and the only other thing to come out of those sessions was that Embrace The Darkness song that was never released. Sounded like at that point Eric had enough.