The clean singing is fine, I honestly hope there is more of it on the actual album (I'm steering clear of the youtube videos because I don't want to listen to phone camera recordings of live songs and spoil myself). I like the main riff too and it works quite well, but for some reason whenever melodeath bands use harmonic minor scale (that kind of darker sounding vibe) I can't help but feel like it was intented as a filler track because no matter what you do with that scale, it always ends up sounding the same. It also makes it sound quite like Dark Tranquillity. On the other hand it will work well in the context of the full album because it does switch the mood up a little bit and the rest of the album will sound less homogenic by comparison I'm sure.