I would love to see them turn old raids into 5 to 10 man flexible mega dungeons with their own queue, dropping mythic 0 level gear from the last boss and heroic dungeon level gear from other bosses using original loot tables as an addition to Chromie time for levels 50 to 60 players.
Also would be nice to see all end-game heroic and mythic dungeons from previous expansions not currently available in Chromie time or TW added to the timewalking roaster of dungeons as well as enable old content endgame open world zones to scale to 60 during the TW event period for level appropriate rewards.
Timewalking should repeat every week rotating through all previous expansions. New bonus objectives can be added using the current TW cycle instead by making it so the gear dropped is of higher quality and so is the difficulty.
Basically old raids would have their own separate queue for levels 50 to 60 available via Chromie time. Dungeons and open world end game zones become part of TW with level appropriate rewards and new world quests scaled to levels in the range of 10-60 all over the world map, and not only in the latest expansion.
Account wide progress on all reputations and major expansion specific long quest lines such as the legion quest line to unlock certain weapon skins.
F2P expanded to level 50.
WoW token limited to conveying gold to playtime and no longer purchasable with real money (no more pay2win).
Ability to play with anyone from any region.
An option to subscribe to individual classic versions of the game at 5 dollars a month, with the 15 dollars a month continuing to give access to all versions.
What would you change? This question concerns the current state of the game and not future content additions.