Yes, we saw this in legion. And WoD previously. Artificial mazes that make simple zone exploration unnecessarily complicated maze run. One-and-only-proper path to your destination, starting half the zone away from you (with a maze in between) when you are 12 ft from your objective, unable to reach it because that rock that is exactly a pixel taller than your jump range. One-and-only-proper paths with fatal gaps that are (in contrast) just a pixel shorter than your jump range - either you make a perfect jump or you fall down just to be forced to run all the way once again just to fall once more.
Meh... Don't like it? Don't use it. Simple. No one forces you to fly. World is full of people who want dictate others things they think are the best. Don't be one of them.
To sum up:
- I can agree on no-flying till max level
- above is provided I'm not being treated by developers like a complete idiot (let me play at my pace, stop artificially making things last longer)
- I can agree flying being behind-the-achievement
- above is provided it's not another one 5-minute quest per week while called "an epic adventure" with RNG and mindless exalted rep farm with one 100 rep quest daily.
- achievement is account bound. Been there, seen things. Doing it 11 more times for all of my alts isn't fun. i already have a job.