This likely is pretty close to the point. Very minimal amount of work and you WILL get the rep required for flying so the rest is just do the other stuff which most people will have simply from playing.this is just an excuse to give everyone flying, each week you get 1500 rep. so casuals wont complain they had to grind out their flying.
meanwhile i hit exalted with legionfall yesterday ...yay i can buy a tabard now.
you need exalted for your class mount in the final week + breaching the tomb. So eventually if you want a mount its a decent idea to finish the rep (or just wait for it via the weekly quests)
One thing I am curious about though is if there are more things like the anduin quest for alliance that will just pop up. Last week the main thing was dull but the anduin thing was actually decent and had a nice cinematic for it.