Weird... maybe... if I was Motorola, and Google was releasing a few new versions even after I was releasing 5.0 on the Pure Edition I might want to test this on one device before finalizing a release on other devices. Motorola hasn't even released any 5.0 version to the Droid Turbo on VZW. And besides AT&T waited so long to release it for their device... maybe Motorola worked up the 5.0.2 version for their release first... after all they did start a soak test as well as releasing it to everybody.
I'm sure other devices will see this 5.0.2 version shortly if this test with the AT&T version goes well... including the Pure Edition and Droid Turbo.
Personally, 5.0 works just fine on my Pure Edition. And I just downloaded the 5.0.2 version on my AT&T Moto X (2014) the night they released it to AT&T... I have not tested that device yet, but will shortly... maybe this weekend.