Hi Lawman, I fully understand your reluctance to fly your P3 after surfing these pages - I was the same !
In regards to the left stick down to kill motors; now, I have come up the ranks of P1 &P2 (similar to yourself).BUT I want to warn you about the CSC to kill the motors - like on previous models.
Myself and a few other Pilots on here have had a mishap using that technique we are so acustomed to, - the CSC once landed - to shut down motors.
I have had my P3 restart and cartwheel along the ground.
For that reason I only use the primary method in the handbook - left stick down and hold.
Maybe its because I held CSC too long - but I never had that happen on previous models.
(I must admit I hand catch 100 percent of the time now too.)
All the best.