A agree with @Admin, but at the same time, something has to be done with balance and availability. Events are great, but they must have somewhat equal opportunity for every player. Currently, solo players have no chance against zergs to get anything at all.
My suggestion for our next event would be Alchemy event. Everyone has an equal opportunity to get daily keys and do instances for more keys. And may I suggest you put good amount of enchantment/manastones instead of tempering solution. Current situation is fairly sad with manastones. I'm in the process of gathering and getting my Kahrun's set ready for 4.x instances, but I cannot find enough manastones to fill it up. So what am I gonna do when I hit 65? I will have an empty set that has no use in any 4.x instance. I'm not even mentioning getting high end PvE and PVP sets.
And I'm not talking about composites, just HP95/100, Crit +17/19 Mboost +28 etc so that people will have atleast a good base set to start off with.
And if you want to bring more life into Katalams PvP? How about transferring your season mechanic into Katalam? There were similar events in Akaron back in 4.8 on EU, and it was super chaotic but great fun. If you could bring something similar to Katalam where people got rewards for PvPing, it would bring a lot of life in there.
I could write an entire page of suggestions for events, but I won't do that here.