I'm too lazy to catch up and read all 4 pages of posts, but the reason I didn't like it at first is because I came straight from playing CotM to playing HoDissonance. The initial "look"of CotM seemed darker(which felt like a CV game) and the music sounded better in CotM, and HoD felt like a step back. I can literally remember saying something like, "I know this could be better! Why is it so bright? Why is the music awful? It sounds like it's coming from busted speakers! If CotM could look and sound like it did, why did they change that to something like this that looks and sounds worse?"
I played the game and beat it, since I'd already owned it by that point, and kept it to add to my collection. Didn't touch it for years, but replayed others. Finally, I came back to it, and I like it much more now. There is still a good bit of darkness in the game, even if the colors are rainbow-bright ;-P ...and the music is kinda good too -- there is an interesting harmony in the dissonance of the sounds. I still think they could have made it look and sound a little nicer, but I also have come to find some enjoyment in what's there.