To the guy who's talking about people being stupid for not being able to choose a set for the certain situation, that's the reason why people are mad. They have sets for every possible situation that they aren't able to use in Ballista because of the Stun effect. I personally don't like it as I feel gear swaps are essential to utilizing each job to it's fullest capabilities.
I'm all for a way to get people playing Ballista again and removing the gear restriction will be one. They did it for Bolts and Arrows after Ballista was first introduced, why not just remove the system altogether.
Side Note: Another set of server-wide JP, EU, NA and other countries Ballista Royales with the 4 winners competing in a tournament to crown the best team overall would raise a lot of interest in Ballista, if only for a short time.