Just finished my first quick listen. Track 4 was what I'd call metal, and it's a bit heavier overall than I expected, but aside from that it's straight up melodic rock, not metal. Sorry, JLT! That's how I generally prefer it anyway. Doesn't seem too ballady, so that's something.
It's had a few minor curveballs (relatively speaking) that to me set it apart slightly from the average cookie cutter stuff, but overall still within that general formula I expect from Frontiers. I didn't expect otherwise.
I don't know how I'd rate it yet. As you said, it's a pleasant listen, not sure how much of it has really grabbed me for another listen though. It's not typically the type of music that grows on you with repeated listens, but I'll give it a few more spins anyway. I've liked it all so far, but there hasn't been a song that really rocked my face off yet. I'll probably agree with your rating.