As you noticed, everything is not out yet in 7.2. Here are some answers and some possible answers:
(Source here)
When can I do PvP brawl?
4th April US, 5th April (EU), and that weekly reset for other regions.
When can I do class order hall campaign/questline?
11th April US, 12th April (EU), and that weekly reset for other regions.
When does class specific World quest unlock?
11th April US, 12th April (EU), and that weekly reset for other regions.
When can I do Legion assault?
4th April US, 5th April (EU), and that weekly reset for other regions.
When does Tomb of Sargeras Raid open?
https://www.worldofmoudi.com/the-release-date-of-tomb-of-sargeras-raid
When can I do Class mount quest?
This quest will be available to do 6th June.
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- New Updates to the D.I.S.C. Belt in Overcharged Delves
- Updated Outdoor Gear Changes in 11.1.7
- Ultimate Guide to Preparing for Patch 11.2
- This comes in patch 11.2 - a Forecast
- Exciting update for Puzzling Cartel Chip on June 11
- Your Guide to the Dastardly Duos Event: Rewards, Gameplay, and More!
- Breaking Down the Mask System: Strategies, Combinations, and Tips
- HUGE Timewalking CHANGES coming in patch 11.1.7