Mission Control is a fantastic tool set available to the community for scenario-writing and sharing. It makes it much easier to throw together a professional-looking scenario and offer it up to fellow players, but writing a good scenario can still be difficult. As a result, there are many scenarios up on mission control, but relatively few of them are very good.
X-Wing thrives on simplicity of design and play, and any scenario inevitably encroaches on those two factors as it adds new rules to the basic skirmish framework we are all familiar with. Writing good scenarios requires finesse; it is easy to over-complicate the game.
Below, I'll go through my process for X-Wing scenario writing, offer an example of how I made a new scenario made specifically for the new Scum & Villainy faction, and offer a categorized list of my picks from the scenarios posted on Mission Control.