I find on the hunters, switching between Aspect of the Hawk and Aspect of the Viper is an annoyance.
So a mechanic, where 'focus' comes back at a fixed rate is welcome.

Ammo was a minor annoyance, but when the changed it to stacking in 1000's, not so much.
Particularly with Jamba and the option to auto purchase from npc's if you have less then 'x' of a commodity.
Ammo was always cheaper then repairs, when grinding... so hunters are even better for farming then before.