Honestly, for me, this game felt almost feature complete when they added docking, even though career mode had not been implemented yet, everything else has been gravy. Squad has done a good job. Having said that, I think career could use a bit more work. An end state would be good. For instance, land (and return science from) at least Mun, Moho, Duna, and Eve and/or Tylo (maybe not Eve). Also, a purpose for science after the tech tree has been opened up... I say this because in my last shot at Career (before 1.0) I'd opened up the entire tech tree, having only gotten as far as Minmus.... and I wasn't even really grinding science (not sure if I could manage that since release, not that far yet.) One way they could do it would be to have some uber expensive tech at the very end of the tree, which requires you to get a lot of science... this tech being essentially just a win state. A "warp drive" or some such (I was thinking along the lines of Scott Manly's interstellar series.) Also more complex contracts would be good to. Perhaps, a Mun shot, which requires you to place satellites around Mun and Kerbin first (for the TV signals of course) so that completion of the contract has multiple stages to it. Ie placing and arranging the satellites, launching the mission. etc. This would not be too hard, the contract types already exist, they just need to merge them. I know much of these things can be done by mods and community challenges, but would be good to see it implemented in stock.