Just to summ it all at one place:
- Eastern Kingdoms and Kalimdor will shard for players starting at lvl 110, previous leveling experience will remain unchanged (besides scaling).
- Flying will be unlockable similar way as it is now.
- Possible (not yet decided if they are gonna implement it) bounties on players as PVP feature (inspired by GTA Online).
- Zones will scale up to level cap of the expansion (Outland will go up to 80, Cata and MoP 80-90) as expected.
- WoW Classic servers are still in early stage of development. No info how they are gonna work exactly.
- No boat of your own.
- More character slots per realm.
- No plans for lootboxes in WoW.
- No new dances.
- Visual update for worgen/goblin not currently planned for this expansion.
- Concerted effort in 7.3.5 to reduce memory costs on some performance things.
- Legion legendaries system will not continue.
- Updated worgen/goblin models will not be a thing at launch but is a thing they are going to do, promise.
- Worgen may be able to autotransform back to human form out of combat. Ion found this idea interesting and see no reason why it could not happen.
- No plans for shared item stash for your alts yet.
- Titanforge items system stays. It will be reduced in item slots it can affect.
- Ulduar timewalking coming in 7.3.5.
- Sorry, no gnome paladins.
- Playable beta hopefuly early next year.
Still cannot find interview with Ion that is goin on in background of tradechat video.
Feel free to add anything else you find.