A lot of responses in the "Nah, you don't need it" camp and a few more in the "Hell yes, it add another level to the bike" camp.
So I'll likely not. As much as I love to get up through the gears, I still want the control for slow speed maneuvers.
I have my 32,000km service on my R3GT in a couple of weeks and if they have it there for two days, they could get it done.
For you
cool "newer" riders of the Rocket 3, a service is something you do when you get up in miles to keep your bike in peak performance. In this case, it's the valve clearance check and adjustment that really requires some attention...plus the standard ECU updates and fluid checks, etc....