They're doing pretty good. I've felt PS3 has lacked diversity for a while, although arguably that was more down to the strong focus by multi-platform developers on FPS and similar action titles.
But now, with Last Guardian on the way, more tactical FPS like MAG, Heavy Rain, etc. I feel that it's offering a good mix of stuff to compliment the cross-platform titles nicely.
Try to be reasonable... its easier than you think...