Well, I don't believe in percentages for things like that.
All I have left script-wise are a few modifications to differentiate the creation of Doors that are made by a player and Doors that are loaded from a save.
Other than that, I'm just waiting on Kaje to finish our initial Door set. Here's what we're tentatively planning to release initially:
Barn Door
Cell Door
Front Door
Garage Door
Glass Door
Glass Panel
Half Glass
Hatch Door
Restroom Door
Saloon Door
Screen Door
Security Door
Wooden Door
After that, we'll be releasing "expansion packs" that just contain new Door types.