In case,
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In it its seen (was clear from items sources to) its a collaborative project now.
As to refactor..
Guess openmw could be an option, there a good array of textures and fitting (steam punk style) available.
Code wise its good to, wonder how it could look..
So far, there for some time the base TES III + Tamriel Rebuild (TES III = island, TR add in the continent and islands around)
Taking a boat ride along the coast is one of the best option scene wise Ive found so far, they are great tombs to, but its not the same at all, water then water and land creatures, buildings + reflects on the water. Use console to get an event day as you are there and bonus..
Tbs, there still quite some progress being made.