1. PDF reflow
Horribly unlikely. PDF is the wrong format for reflow and just doesn't do it well.
2. Titles only view of "Books" listing
Kobo has always had this. From the Books listing, press the Display button and choose "Text Only"
3. Goto page
Marginal usefulness as there's no keyboard to enter a page number on.
Kobo already has bookmarks that sync across devices.
5. Drop the non-free "desktop apps" entirely and just support/patch/enhance Calibre
Unlikely as I'm sure purchases via the desktop are a major (if not primary) revenue stream for kobo book resellers.
6. Add a cache or something in order to speed up page turns.
Books are processed for display by chapter so page turns are already cached. Need a faster processor (a la WiFi kobo) to speed up further.