Here's something that should be added–be able to walk around your ship when in orbit. And maybe you and your fireteam could launch raids on enemy bases and steal supplies, which can be brought to the tower and given to, say, the shipwright, for a reward. Different ships could have various interiors as well as storage capacities for stolen arms/other supplies from raiding bases. This way your ship can actually serve another purpose aside from being symbols of prestige or just cool loading scenes (which are swell, don't get me wrong, but there's room for more).