I think "concensus" is that it is a good album and that Floor does a decent job, but is "underutilized" given her talents. Personally, I don't like the album, but that has nothing to do with Floor. I think she does fine. She does what the songs call for and sounds amazingly solid. It doesn't matter to me that she isn't up at the top of her range more. I just don't like the album.
I also don't really care for Oceanborn much, other than a couple of tracks. But I LOVE Century Child. That, Once, and Imaginaerum are my favorites. Oceanborn sounds to me like an album of a band that had seized on the fact that they wanted to be an operatic, symphonic, power metal type band, but hadn't yet figured out how to do it convincingly, if that makes sense.