On one hand complacency and trusting Blizzard has a been problem trying to rally players to see that WoD pathfinder =/= Legion patchfinder. When first announced many players assumed that Legion patchfinder was right away better than WoD pathfinder because it did not have treasures as a requirement and Blizzard was "better prepared" and had a "plan". The truth is that this is no different than from before.
Technically speaking the majority of the WoD pathfinder achievement involved non-Tanaan checklists to complete. But it was Tanaan achieves that took the lionshare of time to unlock flying in WoD.
Blizzard claims part 1 is the most extensive part of the achievement, but that is most likely not true as that is misleading. Maybe it is a longer check list but if they hide part(s) 2 and/or 3 behind long rep grinds like Tanaan had then they mislead and obfuscated the playerbase with sleight of hand kabuki theater.
All in all, we will have to wait and see how this unfolds, but I am pretty certain at this point it is not going to go over well with a playerbase that will be overwhelmed with what Legion is asking out of them. There is no garrisons to hide how poor the world is to navigate without a flying mount.
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I didn't skip WoD. but I am on my way of joining you along with the others with skipping Legion completely if this is their attitude moving forward.