Hey yeah, totally sensible question - wish I had a better answer. Unfortunately there isn't a great way to transfer an ongoing campaign. That's one of the main issues with getting folks to try out new virtual tabletops - there's some pretty established platforms already out there and there's a fair amount of lock in. Especially if you consider the assets a lot of DMs have purchased on those platforms, like you mentioned.

But I'm hoping eventually Diceright will have enough 'killer features' that people will give it a shot anyway. Would be great if you guys would consider it once you finish your current campaign. Thanks!