Well, I'll tell you that when I finish a game. Mostly bugfixes, historically accurate name of the hardware, and features that help the gameplay (simple but welcome things like displaying what autopurchase is going to cost you, etc...)
Oh and when you have a catastrophical failure and the safety factor drops, the R&D max % is now equal to best safety % you reached while flying the rocket. This is invaluable with russian hardware which has low R&D factors ! Like all the flight experience you have with a vehicle doesn't go to paper basket because of a single failure, and like you learn from mistakes.
Also one step has been removed for the duration missions (the A-level step, which doesn't require endurance from the 'nauts). This is only justice, those were very hard !!
And maybe I'm just lucky but I get a decent amount of money playing the Soviet, which were starving beyond reason in the last version.
'nauts morale is better, they don't massively desert at the first casualty.
Also, the return from the Moon has been reworked. No more "orbital insertion", "LEO activities", "deorbit burn" THEN "reentry" but directly "reentry corridor", then "reentry". Much more realistic, and removing those steps remove difficulty (which is welcome) !
