Personally, I have gotten used to no-flying in Warlords of Draenor, and I have enjoyed my activities in Draenor and all over the place in Azeroth, Northrend, and Outland. I have completed all treasures around Draenor, and hunted some mounts and achievements too.

The community has been very verbal about the no-flying in Draenor topic, and Blizzard Entertainment has heard and considered the concern. Flying in Draenor will be introduced shortly after Patch 6.2 goes live, not immediately. However, there are a few requirements in order to obtain the Flying in Draenor ability known as “Draenor Pathfinder.” You will have to complete some Draenor achievements, and run a few errands before you can unlock the ability.

This is what Ion “Watcher” Hazzikostas had to say about this matter in this DevCooler Article:

We appreciate the spirited discussion on the topic of flying. The subject has brought out passionate viewpoints and sparked insightful conversations on our official forums and blogs, on community sites, and in chat channels. Your feedback has been a valuable part of the ongoing conversations within Blizzard as well, and today, we’d like to share some updated plans for how we’ll handle flight going forward.
The Thrill of Discovery

At the heart of the initial plan to restrict flight in Draenor (even after players reach level 100) lies the design goal of providing the best moment-to-moment gameplay possible in the outdoor world. From navigating the lava flows of the Molten Front in Patch 4.2, to breaching the Thunder King’s stronghold in Patch 5.2, to reaching the heights of the Ordon Sanctuary on Timeless Isle in Patch 5.4, to uncovering secrets deep within Gorgrond’s jungles on Draenor, World of Warcraft is full of memorable moments that are only possible when players explore the world by ground. And as we’ve continued to develop content over the years, we’ve focused more and more on providing players with these kinds of experiences.

However, while we firmly believe that keeping your feet on the ground is a key part of discovery in WoW, we also recognize that breaking free from those restrictions can be fun and rewarding as well, especially for those who’ve already fully experienced the game’s world content. With that in mind, we’re planning some changes in the near future that will allow players to enjoy their hard-earned flying mounts in Draenor—in a way that doesn’t compromise the excitement of ground-based exploration.
Mastering the Outdoor World

In an upcoming Public Test Realm build, we will be introducing a new meta-achievement called Draenor Pathfinder. You’ll earn this achievement in Patch 6.2 by mastering the outdoor environment of Draenor—exploring Draenor’s zones, collecting 100 treasures in Draenor, completing the Draenor Loremaster and Securing Draenor achievements, and raising the three new Tanaan Jungle reputations to Revered. Initially, this achievement will award a rylak mount: the Soaring Skyterror, one of the native beasts that roam Draenor’s skies. Players will remain ground-bound on Draenor until a small follow-up patch (6.2.x), when all players who have earned Draenor Pathfinder on at least one character will unlock the ability to fly in Draenor on all their level 90+ characters.

We believe this strikes the right balance between ensuring ground-based content lives up to its full potential, while providing players who’ve already fully experienced Draenor’s outdoor world extra freedom to “break the rules.” This also provides a general blueprint going forward for content to come. Players will explore new and undiscovered lands from the ground, and then once they’ve fully mastered those environments—a notion that continues to evolve with each new expansion—they can take to the skies and experience the world from a new vantage point.

Thank you for your heartfelt feedback. We’ll see you in (and soon, above) Tanaan Jungle.