I'm in a similar situation; weigh 195#. I don't find the bike uncomfortable but I'm very aware of every bump or road irregularity. If I see it in time, I can to a degree unload my bottom, but not the same as a sportsbike where you can stand and use your knees as part of the suspension. Did you upgrade the suspension? Is it a big difference?
I don't have a bad back and I don't want a bad back