We've been thinking about that. Think the whole technical side will become very clumsy and cumbersome, very fast, if we add RSS support. Can see where you are coming from with that idea though.
We're not going to support PDF's either. We're not planning to at least. Seems like the result looks and feels clumsy. There are also solutions for that out there now (as you linked to).
The problem with those kits, is that you still have to deal with all the technical stuff yourself. Setting up a server of some sort, opening a developer account, handling Apple certificates and so on. In other words, you will most likely still need an iOS dev, even though you bought the kit.