The smoothest bikes I've ever ridden were my brother's V65 Saber and my 98 VFR800. Those Honda V-4s are really smooth. The FJR's aren't horribly buzzy, in my opinion, but they're not the least buzzy bikes, either. OBTW, I've owned two, an 05 and the 07 I presently own. They feel just about equal, buzz-wise, to the Kaw ZRX1200 I owned a few years back.
I'd like to see Yamaha shave some pounds off the FJR, include cruise control as an option, and clean up the engine management. I think the technology is available to have the throttle response/fuel injection behave a little better, but still have the engine meet emissions standards. Installing a PCIII and G2 Throttle tube and releasing some throttle spring tension largely corrected these nit-picks on my 07. (I thought the throttle, as delivered, was horrendously stiff. The 07 is my 7th bike - I had never encountered such a stiff throttle.)
A few more color choices would be good to see.
I, personally, haven't ridden a fuel-injected bike yet that I thought throttled as nice as a big displacement bike with a well-tuned bank of carbs.
With all that being said, I agree completely with Phugedaboudet and Foxhuntr - I'm very pleased with the bike I have and intend to go through many more sets of tires before I'm done with her.