My bike was delivered in F position and after reading a number of reviews on here and agreeing that the stock set up was stiff I arranged with my dealer to have it changed to P.
Here in the UK we have some very bumpy roads and initially in F I found myself bouncing into the tank which was very painful
My UK dealer (JHP) is very well known for racing and has massive experience when it comes to bike set up. They actually told me not to change to the P setting but I insisted so they did it. It instantly felt better as the rear felt more planted but it created another problem as I started to notice that the front end was now too stiff and lacked feel.
Anyway, after another month or so I popped back to the dealer explaining my feedback and got the famous 'I Told You So' conversation. They then set about doing a full suspension setup to my requirements. Things that were changed:
P back to F setting
New Front fork springs and set preload
New Rear spring and set preload
Adjust DES settings
Lower rear ride height
The bike is now transformed. The rear feels planted and the front end offers masses of feedback.
I'm mainly a fast road rider so the bike would need to be stiffened up for track work but most of that could be done via the DES and buy adding a few turns of preload.
Overall, I'd say changing to P is thew wrong way to go unless your genuinely going to have a pillion. Pay as little extra and get the bike set up to your requirements, it makes the bike come alive.