I understand the nature of the beast. I never felt it much in the hands or feet, but more through the whole bike. Now it is much better and hopefully as Roger says will improve with adaptation and maybe a little playing with the LC-1. We'll see.
Unfortunately the mechanical part is there to stay (just a fact of the BMW 2 cyl boxer design).
With good fuel tuning you can probably attenuate the audible part but the mechanical part is going to produce that higher RPM buzz regardless of the fueling. (just back drive your engine on a dyno with fuel & spark shut off & you will still find that same boxer buzz)
I'm not sure I understand feeling it through the whole bike?-- In order to feel
it then it must be getting to your body through your body contact points like hands, feet, or butt.
If some or most of the buzz goes away when you take your hands of the bars at high RPM then it is transferring through the buzzing bars, if the buzz lessens when you take your feet off the pegs at higher RPMs then you are getting some of the buzz through the foot pegs. If you can change the buzz by (lightly) placing your hands at the very ends of the bars (on the bar end weights) then bar end-weight tuning will probably help your (perceived) buzz.
On some BMW boxer bikes you can move your hands to the very outer ends of the bars (on the weights), then play with your feet position on the foot pegs (usually way out on the ends & reduce the weighting a little) & that can significantly reduce the felt buzz. The basic engine buzz is still there but you have changed the chassis tuning enough to dampen the felt buzzing entering your body.
If you move your butt to the rear seat at high RPMs & that changes the felt buzz then some is entering through your front seat as well.
You are probably getting the buzz entry through all body contact points as well as some audio.