I've been looking at the WordPress package lately and I definitely think there is room for improvement. For one, publishing seems to create a complete duplicate copy of all of the media, which is super painful for large sites.
Yeah - that and the lack of feedback when generating the static files. It's fine when it's a small site and generation finishes ~immediately, but when it's going to take a while it'd be helpful to have some indication that things are happening and when they finish.