This proposal makes many good points. If I were rewriting Wordpress, here's what I'd think of:
- Seriously consider redesigning the logical layout of the software. Some sort of rough MVC-ish pattern would be a huge improvement over the 'loop' in Wordpress which is almost impossible to deal with.
- I personally dislike PHP, but I do see its benefits in deployment.
- Make it easy to make beautiful typographic layouts. There's a reason this 1-page wasn't done in Wordpress itself; it is almost impossible to make 'hand-crafted-web' looks in Wordpress without deep CSS and HTML diving. Great blog post layouts shouldn't be that hard. Not all content is the same.