I like your fairplay and your open mind. I am sure you really want to help.
Now, I am developing version 3.0, and it can generate EPUB ebook, with Word-to-EPUB function and without MS WORD.
This is a very good move and doing that EpubSTAR can be certainly more easily adopted.
For 4 : just indicate to download it when necessary ?
DaleDe's suggestion seems promising.