Pretty much no one has really been made happy by World of Warcraft putting most major cooldowns on the global cooldown, one of the many mechanical shifts when the game moved into Battle for Azeroth. This change was addressed in the latest Q&A with director Ion Hazzikostas, who stressed that this was good for the game while the team was also looking into giving a direct impact for pushing these cooldowns to make the button feel better to press.
Hazzikostas also specified that future of the Heart of Azeroth would see the item becoming more like Legion’s Artifacts, with various powers to select. That’s for 8.2; the more immediate future has changes to the Overwhelming Odds World PvP quest to decrease the item level rewarded starting next week. Of course, this imbalance is why an entire progression raiding guild transferred factions this week to reap improved rewards, so… perhaps this is a bit late.