I consider myself pretty seasoned at KSP but not hardcore. This career mode has made me better at the game. A better pilot, better planning, more efficient designs. Gone are the days of just throwing a few more fuel tanks on, you have to think about cost, weight, and number of parts. I do agree that you can very easily paint yourself into a corner with no way out. I had to start a career over do to taking a contract I couldn't possible do and losing money. One thing that would be super helpful is more info about the part that needs testing in the contracts. There have been a few Times were I saved the game took a part testing contract realized what part it was then loaded my game from before I took the contract.