Before anything I apologize if its already suggested, I did search for any similar topics there was way too long a list and I didnt find anything in the first few pages.
A tool for mission planning would be good, right? Like say you are doing a mun mission, and you have like 4 different quests where 1 is test some part in escape trajectory then another one is take science data from higher space, another one is rescue a kerbal from mun surface, to plan all these sub missions a ingame planning tool could be pretty useful and immersive like a sticky note or whiteboard that you can bring up on click on which you can write or draw.
And I know there is supposed to be an ingame trip planner based on what parts you are using and the destination but I dont think you can like jot down your goals and sub missions.
Basically what I am saying is a tool for visual design and algorithm tool for reference of what future missions you plan on doing would be helpful.
If nothing else just make the game awesome.
