I haven't played SB for a couple years, and I was happy to find that the 1.0 release is now really a very complete and solid game. The amount of quality artwork in SB is absolutely staggering as well, so much props guys you did very well. The biggest issue of course with any game of this scope is that the shear volume of static content required to prevent repetition and continued interest is pretty much unachievable with a fixed team. Therefore I think a Spore style system, where static content could be farmed from the community would be a big win. Naturally devs would need a way to quickly review, tweak, and approve said content, but I imagine that's pretty doablem and an efficient way of adding tons of quality variety quickly.
I have a vision ... it's Starbound Penises all over the Galaxy xD No seriously, i think this idea would work great in addition to terra forming for example. Creating a unique planet, with player created monsters and so on.