Honestly my thoughts of why I like DMM so much better are this: Even though there is more salt and there is not always the certainty of getting a rainbow, you at least have more opportunities for that chance to get that rainbow here. I remember playing Nutaku and each FG you got was like a drop of water in the desert. If you wanted to save up for a 50FG 11 roll, it could take you a while to save up enough. So while Nutaku is a desert, the DMM side is a tropical rainforest where you are just showered with FGs among other great game items. If you want to succeed on Nutaku side, you almost have to be a whale. But here on DMM, you don't have to be. Because even if it's still the same low chance, you have more opportunities to take that chance. I played Nutaku for almost half a year and only finally got my 1st legit rainbow when I was leaving and burning FGs just for the heck of it. On DMM, I had at least 2-3 rainbows in the first few months. Big difference.
The downside is I think a lot of people may be turned off by being unable to read the text in the game. I know that is what made me hesitate at first. But I'm still glad I made the jump. Even though maybe this is a smaller group, at least it is friendly and will likely still be here long after the sad day FKG falls off from Nutaku. So I'm definitely glad to be here.