When they introduced it (base building), I played with it for a while. But really the game is about exploration, so bases isn't really something I bother with now. My old base hasn't been visited by me for a very long time, forgot where it is and not too bothered finding it. I have all the vehicles but don't really use them apart from the Roamer, which I use from time to time. They sort of made vehicles obsolete when they introduced 'call your ship'.
HG tend to do some things backwards it seems.
Exploring is great, but could be really great, if they spent a little time on it for players. Abandoned cities (with story line to follow etc). A more varied outlook on wrecks. Long forgotten species to find and so on. Not via quest, but you find them naturally through exploration. Then follow a line of inquiry type thing, to find out, who, why and where.. That type of thing.
Just a little more time on exploration for players, would really please me.
One thing I do enjoy is visiting players bases, farms etc and looking around. There are some really creative people knocking around.