While I'm still unsure if it's the best choice of engine for this project, I've actually started working on port. First thing I've started to port is world director.
Ported about 2/3rds of director, day cycle and weather (mostly) is complete, only thing left is making it spawn items around the world, although that requires completion of inventory first. Which means...scaleform...*ugh*.
Anyways, here's a video of what I've done so far (about 5 hours) it's not much, but there's some things to learn, before I can be efficient at CE3.