I like the idea a lot, I've suggested to add custom cockpits already in the past but no one had the time/knowledge to make them possible until now as it looks like.
However, I think this will also face some problems. One of the commoner would be the FoV for CapShip remastered cockpits. When you have a libdread, you want to see a lot of the bridge, the problem is : How can you give the player enough of the cockpit and have at the same time enough sight to fly your ship? As usually in every movie & co, not the captain is flying but a pilot that is closer to the front on the ship. So what we are going to be, the captain (that is more middled in the cockpit) or the pilot of the capship ( that sits more near to the front ) ?
If we would not get enough sight to fly our ship actual, this would be ( sadly ) pretty useless. One of the main functions of this game is, as everyone should know, to fly around. Well, personally I wouldn't mind sitting around in my cockpit just next to planet manhatten and looking at the wonderful bridge. But that is my opinion.