Ok, another serie of test :
- the fan is always ON and acts strangely, it turns off when throttle is applied and turn ON again at neutral.
- there is a difference with the previous firmware, at very low speed or at start the cogging is more important, and we can hear a longer sound while the ESC probes the rotor to start.
- the power limiter works good.
To conclude on my tests,
==> PROS : torque control, smoother at low speed, power limiter very usefull for my children
==> CONS : incompatibility between punch control and torque control, a lot of additionnal cogging at start compare to previous firmware

Fan always ON