While there might be suspension mods (I.e., upgraded dampers), it looks like a stock RKP to me (muffler baffles have been obviously modded) He's sitting higher because police models come with the pedestal mounted sprung solo air seat and the stock bars keep you ideally leaning slightly forward, just like on the std RK.
If you're having trouble with side-to-side transitions, your solution begins and ends with HEAD TURNS! Want an extreme tight turn? Head over your shoulder in that direction...and keep it turning further as you turn further! Want fast transitions? The sooner you turn your head, the sooner your turn begins!
Of course the bars must follow the head turns! Counter-weighting may help you to get to full-lock and/or to dragging the boards consistently
Friction zone/throttle problems? You're in the sweet spot in the friction zone when moderate throttle variation no longer affects vehicle speed...just don't remove power to the rear wheel by closing the throttle or squeezing in the clutch. Ride Like A Pro's founder Jerry "Motorman" Palladino demo's offset slow cone weaves with ONE hand: locked throttle, LH modulating the clutch and RH on his mic describing what he's doing!
Dragging the rear brake helps stabilize the bike and helps control speed in addition to the friction zone by providing an opposing force to the forward motion of the bike.
How do I know all this? I'm a skilled and practiced MSF RiderCoach that specializes in ERC's (BRCIi) and ARC's (sport bike course). 30yrs in the saddle, 10 as an R/C. I'm a grad of RLAP and was trained by Motorman and his wife. Many of my riding buddies and co-R/C's are MO's and/or MO Trainers. Two MO trainer buddies run NJRLAP, and I can hang with them easily.
To do what you see in the vid and be competitive in a police MO rodeo requires an obsessive desire and dedication to practice, practice, practice an inordinate number of hours. You will drop the bike, and you will burn-up clutches!