'Bout time I get some thoughts to paper, eh? :)
Indeed, the "part 3" of this series will really just be me geeking out about building the ultimate STEEM server -- hopefully my experience can help inform other witnesses and we can push for a more decentralized data environment!
Re- how steem manages data, I totally agree. It's something I want to dig in to soon, since it seems like it's currently a second class citizen as it currently "works". We can do much, much better.
RE: Fully Decentralizing dApps