Hawks don't look that good on paper either. The eldar actually have better more reliable ways to kill AV 14.
A 10 man unit should hit with 5 (4+ to hit with Intercept), and then less than 16% chance to pen. That less than a 10% chance to pen (and lets be real here, glance tanks all day and they don't really care).
Then look at a wave serpent (available at fine eldar motor pools near you) with TL bright lances. They will hit 75% of the time (4+ twin linked equals 75%), from that you should pen 33% of the time. That means with a single serpent you have just under a 25% chance to pen a AV 14.
Those things are available up and down the force org chart. They are also expensive, but you get one for a little more than half what most AV 14 vehicles cost.
Heck take a BL in almost any other format and it is almost equal to your chances with a Hawk unit. Guardians with a platform hit 50%, pen 33% is just over 15% to pen with a single. I know you get additional glancing hits with the hawks, but you also require a more expensive unit as well as the opportunity to get them there.
I know not everyone looks at stats the same, but all things being equal they can give you a good idea how something should perform. The numbers for the hawks just don't measure up. Trust me, I wanted them to work in the current dex, and most times they just leave me with headaches.
One other thing, if you insist of them don't immediately discount deep striking. You don't have to use deep striking to get close to the enemy. You can also use it to buy time, ect. There is not a whole lot of difference between jumping up behind a piece of terrain and DSing behind a piece of terrain. It does allow you to wait to see where you opponent commits before you make a move.
I'm posting it because it's nice and succinct, which is much different from my normal wall of text. Might as well steal some content as I'm trying to convince some of my peers to contribute here. Notice the not-so-subtle hint?
And here's a blast from the past, just 'cause I hate posting without pictures.