this actually came up the other day, though it wasn't an intentional discussion. two things got some focus: the wack build backend that might've made the initial release so buggy, and the lack of customizations that aren't just color retextures
if the build/patch infrastructure could check that the public build definitely has all the changes and fixes built up over testing the beta, there wouldn't be moments where a new patch comes out and the world suddenly breaks (c.f. that one time every AI ship went super saiyan with multicannon pacs); all those "why is this broken" threads wouldn't exist, way less load on mods immediately
now on the other end there's making customers happier. everyone
likes customizations, I can't think of someone that doesn't like getting to name their ship for example and there's enough that people would pay to have the name physically on the ship. but there's tons of stuff people would want that
isn't in the store, likely because those assets would be quite an investment: being able to decorate the bridge/cockpit as opposed to just the dashboard, different suit bumpmaps as opposed to just suit recolors, and the like. people always bring up "why is the anaconda so junky inside", imagine letting them buy an alternate that's super sleek/even rustier. or redecorating a courier to have fuzzy dice and a squid monster pinup on the side. or any of the crazy truck interiors you see irl:
http://i.imgur.com/hIfJYFC.jpg
http://i.imgur.com/PK4e0yF.jpg
and it's not like art can't afford to do this, because imagine how much the sound department costs every month
almost every feature has spots that, if hit, would instantly improve QoL and also be used to attract new/bored customers in. PvE that goes past the Everquest-style "field of rats" in particular would be a huge selling point, since that gives players something to do whether they're solo or doing co-op