IMHO, here's my thoughts on flybarless heads vs Helis with a flybar. One characteristic of helis "with a flybar" is that the trims change with airspeed changes. That's why we have different trims set for different flight modes. Another example is while doing continous straight forward flips the heli (with a flybar) tends to walk around if no correction is given.
When using a properly setup flybarless heli those behaviors above simply dissappear. The model just stays in its attitude where ever you leave it. Not to mention the loss of the flybar and related linkage reduces weight and allows more power for the model, not to mention better autos. It also turned my docile heli onto a super machine on cyclic control. I think I could do dissapear flips, Ha, Ha.... I just dialed in some dual rate and added expo and it now flies just the way I like, but that's just me....
On the other hand, stationary piros suffer a little. Because we hover at a slight angle (torque related), when doing in place piros the flight control system tries to keep the heli's mainshaft at the angle it was when you started the piro (plus some gyroscopic action-I think) and with no correction the heli can seem somewhat odd in behavior. It's not much more difficult to fly in piros, just a little different.
One final item, if you hold some control before liftoff, it's possible to flip the model on the ground as you liftoff because the flight control system will continue to add control as long as you hold an input until the swashplate is quite tilted! Simple solution is to just lift off first then add inputs.
Overall, I love a flybarless a heli with a flight control system. It's so much easier to do 3D. And, I just love no trim changes from slow to max speed. I too like to fly F3A style as well as 3D.
Keep up your rotor speed !