Have the devs completely stopped making endgame content?

Tel Deadras has been killed 900,000 times. How is it that they don’t add anymore between then and now? Are they actively trying to tank their own game? Why hasn’t the spring update been officially postponed til October? All you see on the discord is hey we are working on level 20 content again and wiping for the 6th time on the PTR. Masteries are gonna introduce so many bugs that they’ll have to reboot another 6 times