Vader is most definitely thinking of going in with his lightsaber... What's the point of having a lightsaber if you don't slice your way through things with it once in a while.

If this is anything like a ship from back home then it will either be able to land with it's door flush to the bulkhead, have an extendable port for that. Or if not, hopefully Finn will be lucky enough that the exit has a force field to keep the atmosphere in.

First though, he has to land.