Im with Cookiemonsta... for a pure Acro Flighmode, i don't need HF at all, i test it once with a very old Baseflight version and i nearly crasht the Copter couse i was confused.
I come form Helicopter and for me the front is always the nose
Now im Flying the KISS FC and this only got Acro and Level, fine for me and all i need for a Acro / FPV FC.
For GPS Flight on the other hand, it can be useful, special for the new Pilots, or once you don't see the Copter not clearly (to fare away)
I also find it useful to place some white LED's to the front, if i lost the attitude of the copter, for a LoS Copter.
Anyway, if the AQ can handel Acro and Level/GPS flight in one and the ACC Sensor don't lose the attitude for Level flight it will be my #1 couse for my upcoming FPV Case Copter.