Hi Heather :)
1. I know there are a few people who had/have the same thing in mind, to move over from ClassiPress to Vantage when it is released, however I'm not aware of any specific plans to implement a built in migration feature to make this an automatic process. I will have to ask about the possibility of this and let you know. If there aren't plans, then I imagine that the alternative would be to run a custom sql query to migrate any fields from the database side.
2. Your steps are correct. I wasn't aware of the issue of purchasing international domain names from Bluehost, but if you have already checked this out then I'm sure it's true
3. There are definitely plans for future themes, but outside of what is shown on our
Themes page, I don't have any additional information about what these might be I'm afraid.
All I know is that the annual subscriptions are happening soon, I don't have an exact date sorry. It's very close though from my understanding though.