Just watched some more footage like this 17 minute chunk below and man, I really feel like its a huge step up from the PS1 copy I played long ago. I know people are desperate for features to be brought over from the saturn version, but I completely disagree that the devs have done no work and are being too lazy to do a good job. A ton of effort is being put into this by a small number of people to bring us the definitive version, if just for the widescreen support and framerate improvements.
I refuse to believe that they've been sat on the button that switches on all the saturn effects and simply decided they weren't going to bother using it.
EDIT:Just want to add, I do agree that the saturn version has many improvements over the PS1 version, and I know why people want those effects brought over. I just think if it was a straight forward job to use that as the base, then they would have done it. Budgets and time constraints will have been the big obstacle I imagine. However, I would be keen to also learn more about why so many of the effects were better on the Saturn version of Grandia. Anyone got some good insight before I start googling?