I've seen a number of old players saying they are quitting because the game became boring after the mission patch was added. I believe that the sentiment behind this is that there is less exploration feel or variety in the game. I think that true after you run through all the missions, but I can see the point that before through the arcade you at least got 4 pre-levels that were different for FSC/JK. Now its the same 4-5 levels.

My suggestion is to give a large enough incentive to run Arcade levels. We saw it happen with the cake event, people ran all kinds of arcade levels to get cake. So make doing Danger Rooms worth it by putting a rare chance drop of an accessory, weapon, or armor. Something that would make doing those random levels really worth it.

I believe with that kind of incentive at a rare drop from a specific location type like that would attract a lot of play in variety. The advantage is you can do it at T1, T2, or T3.