This is a question more directed at the developement team, which I hope reads this forum from time to time...

The text in the latest update suggests the team has the intention of migrating to a newer version of unity at some point (no idea what kind of a jump you are looking at).

Having been on board with Dreamfall: Chapters since it's funding campaing, I think it might be Worth thinking about their experience when migrating from Unity 4 to Unity 5, which was rather disastrously complex and cost them very strong delys.

I don't propose no upgrade is made... just that dev expectations be realistic.

good luck with the work, keep things going they are looking good!