Thank you for answering the questions.Hi.
3. You will need to redo your share definitions and reimport data, fan art, etc.
4. Nothing has changed regarding EPG. Nonetheless we recommend to take a look at @Lehmden's EPG Buddy.
All in all the new version is such a big step forward that we recommend to take the hassle and go through a complete media reconfiguration. TV is migrated.
Do you mind explaining what "share definitions" are, and what data needs to be reimported? (I don't think I imported anything for my current configuration; I just set up the channels and XmlTv, which was itself tedious and time consuming.)
Also, what is the status of MediaPortal2 and EPG? I have never been able to tell if EPG was built in to it or if a plugin was required. I see you recommended EPG Buddy. I will try it if EPG is not already built in to MediaPortal2. If EPG is already built in to MediaPortal2, then I might need help figuring it how to activate and configure it.