Seems like some of their HD changes are hit and miss. Chemical Plant overall looks good, but Hilltop looks like shit. The soundtrack news also has me somewhat worried because if the early Sonic games did one thing right all of the time, it was the soundtrack.
Anyway, when's Sega going to shut this down? I'd assume with Sonic Mania, that team would be the ones working on any HD remakes of old Sonic games and not another fan group.
Sega doesn't care about fan projects at all, not to mention this one has been in development for about 9 years now so if they wanted to get rid of they would have done years ago.