The monoshock on the lightest pre-load is still to stiff for me (205 lbs).
Preload doesn't do much for stiffness on a bike with a single-rate spring. Use it to set sag.
I doubt the spring rate is too stiff for you, though I guess it's possible. More likely it has a [censored] shock that doesn't respond well to bumps. I did an R1 shock swap on my 2nd Gen Versys. Not sure what you can do with a gen 3.
That was a fun bike, and I'm sure I'd like the new one.