I love everything Blizzard have done with the game to be honest but what I would like to see is;
More mount speed improvements, why stop at 310%?
Let us pay for access to flying in zones rather than achievement grind, heck, put the licences on the Blizzard store.
I want more mini-pets on the Blizzard store that I can buy with upgraded passives, oh and special heirloom armour for levelling that will make the game’s progression a lot better. Put it at a reasonable price.
I want more sub-races with better and more competitive passives that I can grind towards or pay for a race change to use.
I think it would be a good idea if players are encouraged to visit old scaled content to grind for upgraded versions of their loot/mogs.
I think all specs for every class should just be made into ‘one’ spec that you can micro-manage. So that way people can tank, dps and heal all at the same time or just have access to multiple and simultaneous dps trees. It would bring back some of that old ‘nuance’ to the game while eliminating pointless steps to getting there.
Just give us all the same gear sets so we don’t have to farm for or grind specific pieces, maybe make armor/weapon loot boxes available in the in-game store.