I don't completely understand why they're doing it this way either. Now, it has been stated at The Breakdown Room that they're already starting to write more material so it could be possible that they're going to release another album within the next year and that would make up for this release being so short. Regardless of length, I'm just glad to be getting an album that is written by the entire band and if it ends up living up to all the hype and is really amazing, I won't be complaining at all about the length.
Countdown To The Book Of Souls: http://tinyurl.com/oe69dm9
Countdown to Speed Of Light: http://tinyurl.com/o25ox46