This suggestion is focused primary on making movecraft better. Many servers have plugins which allow you to use stairs as seats, and I think this would work great with movecraft vehicles such as trains and zeppelins. I understand that this would probably not work natively, but I'm sure you could do some magic to make it play nice or even just code something fresh.
I see this working one of two ways: either all stairs on the server can be used as seats, or only stairs on piloted crafts- maybe even only specific craft types, e.g. the afore mentioned trains and zeppelins. If this is implemented I feel like it could make movecraft just that bit more immersive and realistic.