I am intrigued by the idea of relying on micro.blogs to manage comments. Treating it like that reminds me a little of Disqus.
Interestingly, I actually went from one to two in my transition to the Indieweb. I wanted to leave my main blog, Read Write Respond, for my longer posts, while I use Read Write Collect for everything else. I must admit that I am progressively consolidating more and more of my disparate parts.