Making a MP Mission "Too hard", deters Users from playing it through.
At least on open public servers, on private servers We've had a single mission run for what felt like DAYS, and of course DCS Crashed before it was completed), but the amount of objectives was crazy, it was not a single flight mission either, ie once a flight's mission was done, Users would then exit that Aircraft and get into another and follow the flight plan for that flight and complete objectives for that flight, opening up another flight to fly after landing.
The Problem, is New Users/Steam Users think DCS is a "Game" like "Ace Combat"
And expect the level of Difficulty and Price of Modules to be aligned to that (ie they want A-10C to be $1.99 etc etc "$19.99 is too expensive". Then they complain it's "TOO HARD".
Where as BMS Players already know the deal, it's a Study Sim...