Personally, I don't see why everyone is getting so bent out of shape over this. It's not like this is the first time there's been multiple albums for the same soundtrack(s).
Chrono Symphonic > Chronotorious
Relics of the Chozo > Harmony of a Hunter > Metroid Arrange 25th Anniversary Album
So what if they're running concurrently; this only shows that there's an immense amount of love and appreciation for the soundtracks in question. And hey, you can never have too many quality remixes, now can you?
(and in regards to FF6 specifically, it has Terra's Theme. I guess the overmixage is now spreading to the rest of the soundtrack... )