Patience. Seeing as how Drew is improving like crazy with every update, yet also kinda of moving a little backward now and then, I'm sure he's planning on Akebono being his best work with her popularity.
The day will come when Bono get an upgrade and it will be a masterpiece.
Come to think of it, Oboro should be in there. Wait, holy crap. Oboro's art weren't Kai ni, but rather Kai. SHE GOT A NEW ART ON KAI. KAAAAAAAAAAAAAAAAAAAAAAAAI.