Hmmm... buyer's remorse. Tough one.
Are yours and your wife's butts more comfotable on the FJR after 3 hours of riding, than they were on the R6?
Try fetching groceries sometime on the FJR - seriously. I tried it once and felt like I was driving a two-wheeled truck with the capacity it has to haul...and I could easily carve corners enough to shake the milk up.
Try looking into suspension upgrades - I hear that makes a HUGE difference in the handling. Search the forum here for "haulingashe suspension settings" first, though, as the data shared by this gent has helped many an FJR owner find a better setup with the stock suspension.
Check your tires. I know lots of people swear by the PR2s on this forum. I'm still running what came with mine, but my limits are pretty low and it's easily enough for me on pavement.
Adding power is a nice way to combat weight, so maybe research "power commander". There's an ongoing thread in the Technical section about airbox mods. Done right it helps, though taking it too far can hurt, if I recall the gist of the thread correctly. Mufflers seem to be a personal choice thing, though may be needed with a power commander - again, search the forum here.
There is a smacking huge load of info to cure your ills in this forum young man! Cozy up to the "search" button (look up and to the right, just below the header image on this site) and start asking the forum to pony up with ideas and info.
Almost a gaurantee your question has been asked and answered, so no need to wait for old farts to fill in the thread. Jump in and get a head start...
...and boy are you every luck you didn't post this on a Friday...
After all that, welcome to the joint