Speak softly and carry a big stick.
Wordpress is more customizable from an end-user perspective, for sure. But from a code perspective, it's only more customizable if you like to write PHP code.
WordPress is definitely a great blog platform and one that we would like to emulate in some ways, and hopefully improve upon in others.
We're addressing many of the issues and are always looking for contributors to help us out in that regard.
As for the IFileStorage someone mentioned, someone is working on a mockup for that. But ours is related to storing assets (images etc...) so that you can upload it to a BLOB or the file system.