How to fix the issue of finding "quality missions"
You know, weirdly enough, that actually sounds like a good idea.
Not 'sploit missions' of course, but the devs could use farm missions as a datamine point to discover what people are enjoying and not enjoying in the game.
I'd like to see them tweak the rating system into something that can actually be used as a tool for connecting players with the types missions they want to play. Maybe something as simple as adding different categories--like "Story", Solo", Group", Challenge", "Extreme", "General" and what not. Then when you publish the story, you can flag it with as many of these you think applies. So that when you do a search, it will only list mission that match your tags in the order that you listed them.
Something else that might be useful (though maybe not possible, due to space) is player comments that can be viewed by other players.
I do not take credit for this idea it was an idea my friend said although I whole-heartily agree with it. I do not expect it to be implemented though as it would require a change of philosophy on the devs part. Anyways the premise is simple:
Don't care if people farm.
First gonna talk about farming real quick. Farming is done to advance a character quickly. Now in a MMO where all the missions are the same advancing characters quickly can break down some of the monotony of getting multiple characters high level. One thing about CoX that I like is there are a wide variety of characters you can choose from. Farming can help people achieve having a wide variety of characters. Without farming you may not consider a certain combo because you don't want to take the time to level him/her high enough to be able to figure it out.
Now for mission architect. Ok the whole idea is this: Let people be able to have farm missions without being banned and have an option in the creator to mark your mission as a farm (bolded to show that this is the real suggestion I'm getting at). Simple yes? Now you might be saying "But in MA mission you level WAY too fast." Yeah I agree with that. However instead of banning farming I more agree with the idea of fine-tuning the game to make farming less of a deal but again STILL ALLOWING IT. Plus devs could go into high rated farm missions to see what major exploits are being used and fix them. They can use the farmers as a tool to figure out what to do more easily. Now you might say "but people wouldn't be forced to mark it as a farm so why would they?" But if there's no penalty why wouldn't they? It could help create a farming community where people bounce ideas off of each other and add their own individual twists.
So in short: Try to keep the game from turning into City of Farming but don't ban farming. There are people that like farming and some that don't. You need to keep both sides happy.