That they're going to do it?
Yeah, not all of their promises have actually been fulfilled, but they have said this is a priority for them, so it'll get done. They seem especially dedicated to the new client, too. Heck, they even made practice mode. We've been waiting for that for how long? And it was made for the new client.
It'll get done. We'll have our item sets.
Also, stop whining. There is an option to open the older client from the login screen. You can make item sets there, then make a quick custom to make sure it gets saved. I literally do this all the time, it's not hard.