With Central 2.5.2 you can use the GUI to configure port based tunneling with 2930F and other supported AOS-S switches (I think 3810 and maybe even 5400 series?). So for our new branches we will definitely get 2930F as they're half the price of 6300F. So far we haven't seen any benefits with 6300F even though we just 300 pieces or so (though only few have been installed so far).
I hope Aruba would come up with better reasoning why 6300F is better in real life, and not just "but it supports NAE..." as the price point is 2x compared to 2930F :)