I might buy the DLC in the future, but it would need some updating. The key feature is the mission builder, which is a great idea but with terrible execution.
How I think it can be improved:
-Add user created missions to contact window on career
-Allow other players to rate contracts on difficulty and overall quality
-Organize contract offers to make sense for in game progress, with top rated missions jumping to the top
-Incorporate reputation reward for mission builders, maybe use it as a multi player currency
-Be able to create single use contracts that actually effect your world. (Offer 300k and 50 reputation for somebody to put your probe into Duna orbit)