Now I really need to hear why that is so because I just played Dungeon Siege III through and it is bad. Not only that it failed to bring a satisfactory action rpg experience in its own, it hardly has anything to do with earlier Dungeon Sieges gameplay-wise, and the story isn't glimmering either. The camera is horrifyingly bad and the whole game felt rushed.
And that is the main thing with Obsidian Games (Fallout New Vegas, Alpha Protocol, check their list for the rest of 'em) - every game they've ever made has been rushed, resulting in either a buggy game or one with lackluster content. Usually both.
Thus, I wouldn't expect much. Which is a sad thing, considering a new Chrono Trigger game could be quite a blast.