Question: can you still get warglaives of azzinoth?
Answer: Once you have both Warglaives and Patch 7.2. 5 goes live, you need to finish Black Temple Timewalking and kill Illidan. After killing him you will earn the 'I'll hold these for you until you get out' achievement that will reward you with the "Arsenal: Warglaives of Azzinoth". You can obtain two Warglaives.