I was sending you a PM as a followup to the reject as we can't really put many details in the message, might as well post it here:
Drama and Live Action albums are generally not allowed here unless the franchise of the product is a game/anime one.
We make some exceptions for prolific composers in the fields we cover, but I don't really think Sawano is one of them, or at least not yet. Most of his works are still in the drama and movie field.
For some examples of solid anime composers see Yuki Kajiura, Shiro Sagisu or Yoko Kanno.
That being said, we don't reject an album or two if the info provided is complete, as you can see in the
Mare soundtrack,
Platina Data, or the NHK Works album you linked.
See this thread for some more discussion on the matter, although keep in mind that in that case we were talking about a composer who has many more works in the anime field than Sawano, and about a very complete entry:
http://vgmdb.net/forums/showthread.php?t=14734 (in particular
this post)