I don't think the problem is that they're trying to "move forward". Moving forward doesn't mean just adding a bunch of electronic effects to your songs. Again, none of this is really new for them, so it's not like they're experimenting or pushing in different directions. I... kinda wish they were doing that! I'd love to hear something from them that I've really never heard before. (Something like "Heaven na Kibun" on Yellow was a song like I'd never heard from them before - that was moving forward!) But "Tonight" especially, and also a few other songs on KFTD, are like other songs they've done in the past that I also haven't liked. So, not new, and their "newness" is certainly not why I don't like them... it's just not their best side. It's a common straw man argument in music to say people don't like stuff because it's new; that's just not what this is about.
All that said, I do want to reiterate that I don't dislike the album or anything. It's not my favorite Scandal album, but that's like saying chocolate isn't my favorite ice cream flavor or puppies aren't my favorite baby animal. All their albums are great, and I'd take any of them over anything from most other bands. But they've got 9 studio albums now (not including Encore Show, which is certainly a full album's worth of songs not on other albums), and I'd have to put KFTD in the bottom half, unfortunately.