Things that should be added

[Rocket builder]

I play Kerbal Space Program since rhe beginning of the last year, and I think there are some little details that could make KSP way better, like air an air compressor, wich transforms intake air in oxidiser using some EC (it could be an IRSU feature) and the possibility to (as a cheat in Sandbox mode) add parts and edit the rockets that are already launched; another cool feature could be an air-distributing sistem just like the fuel one.

Another thing I think should be changed is that you must set structural pilons  for every part singularly, making this a very long process for big rockets.

I think those could be small, usefull features and changes to the gameplay.