After beating all three routes the Normal route is easily the best if you care about story. It's the only one that has battle cgs for the big fights, and is much longer than the other two. It also does a decent job of making you care for the main cast. I actually like the main male love interests.
The second route ( the one where you join the rival faction with your sister) was really underwhelming in term of plot. Getting to play your sister(Mei) almost feels like an afterthought , but it's nice that you can play her. Easily the best part of this route is getting the backstories for the characters in this faction, but other than that kind of disappointing compared to the normal route.
The rogue route is just the full on H-game route so story is bare as fuck, but you actually get to play all three girls. and get most of their scenes which are in this route. Kinako(the yellow one) gets it rough though i feel bad for her.
In term of h-content Mukuro(MC) gets the most scenes and out of the female cast she's my least favorite, i much prefer the others. Thankfully Oneone1 said they are making a big update that adds more scenes for the other characters as well as giving Momo and Kinako more animated scenes. Speaking of those, it sucks they are one whole loop, i wish you could loop certain parts in the gallery.
Overall i still really enjoyed the game. The normal route was the highlight, and this game is quite long, it took me over 20+ hours if you read everything. The gameplay rpg part is really weak though, it's really easy and very little variety even once you unlock the Dark elf transformation, it feels lackluster. Im very excited for the big update whenever that comes out.