Air power may either end war or end civilization.
— Winston Churchill
So fliers are definitely great for supporting ground troops and taking out other fliers, at least until the game adds more anti-air options. Thankfully, there's still no auto-win button.
One of the other issues is that "zooming" fliers have wide turn circles. The restrictions on one turn then minimum 18" movement can cause air traffic nightmares on a small 6'x4' table. My last game had this happen:
I am sure there will be more flier discussions in the future. I don't have any experience against the Ork or Necron fliers yet and I've only played against the Dark Eldar one in 5th edition. I am curious to hear what others are experiencing with and against fliers so far.
Until next time, I will keep trying to fly circles around my opponents.