It's obvious port of the first game with more bloat then improvements . Star notes, clothing items, Diva Room who needs that? Major issues such as the 30 FPS cap and Luka's buggy hair are still present. The song selection is great tho. I'm disappointed that SEGA directly ported this peace of crap to the PS3 rather then making a DT-like@60 FPS version for it and even released it outside Japan knowing how bad it is.
I think you're being a bit too hard on it. Think of it as a sorta-kinda reboot when it comes to art style. I know quite a few people who weren't necessarily fond of the DT art style as they tried to go "realistic" but it didn't look too good with eastern/anime styled art.