Take a few steps back from the situation, and you can gain a bit of perspective. It's likely a large majority of the people download this album (when it is eventually released) will have no idea that it took years longer than planned. They'll just be thankful to OverClocked ReMix for providing an awesome multi-disc remix album for a game that doesn't receive too many remixes.
As for those involved behind-the-scenes, you can just chalk it up to a learning experience.