Twitter sucks ass and I don't want to scroll for a week to read your blog post. Please, please, just copy+paste it into a blog post and link to it on your Twitter. I swear I will "like & subscribe" to your Blog if you're worried about not getting enough eyeballs. I just do not want to ever have to look at Twitter.
Tweets get lost, they're usually meaningless, they aren't editable, you have to scroll through them, the comments aren't nested well, the URI is garbage, you can't group them by tags, etc.
A blog could be designed to encourage abbreviated blog posts, and even help you split a post up for re-tweeting if you really wanted. Even auto-resize just to make it easier to see the entire thing in one page. Yet would retain all the great properties of legit blogs. You could call it "tldrblog".