For...? A really long grind on gear that's worse than I have.
Harrison Dailies
Garrison bounty dailies
Gathering Professions
For...? Harrison chain is very short. Gold nets very little, and these quests are not an efficient way to chase gold when I can earn more passively through Garrisons (assuming I cared about gold). Professions themselves yield very little in terms of rewards and can primarily be improved through the Garrison itself.
Again, efficiency is key. Venturing out into the world for pet battles in Draenor is pretty meaningless. Now the leveling curve for pets can be done primarily through the Garrison itself, and most rare WoD pets are netted through the Garrison as well.
The flying conversation is kind of annoying because it goes around in circles with very blunt and simplistic reasoning tied to why it was removed. Flying mounts do not actually improve efficiency on many activities like gathering or quest completion because the design will always be based around a set time spent to accomplish tasks. Better flight points have made Draenor extremely easy to get around.
Stuff like Archaeology isn't even actually bad because there's no flying. A lot of the nodes are just in zones that are too wide, and their placement feels somewhat cumbersome, or split awkwardly on multiple planes. Flying is usually a band-aid for stuff like this, but it would be better if it wasn't needed at all. Mechanically it introduces nothing interesting, and its absence has nothing to do with where the game is at right now.
As far as I'm aware Blizzard hasn't even put in an Archeology title for finding everything in Draenor. WoD is filled with arduous grinds that yield poor rewards or dangling threads. Same set up with Apexis Crystals. With the reputations. With the statue unlocks in the Garrison. This is the stuff in the game that's really unfun and almost feels insulting. Flying doesn't solve any of this stuff. The only thing it does is exasperate the social gulf that exists between players.