I rode an FJR for 14 years so I know what you mean. It kind of spoils you when it comes to always-available power.I traded a FJR for my '21 NC750XA. The power difference is huge, yet it really isn't when you think about riding style. I am not a street racer so I really don't need or use all of the available power on the FJR. I got lazy with the FJR because being in the 'right' gear was not so important due to the torque available.
The NC does just fine and knowing I do not have excess power available makes me think harder about making safe passes on two-lane roads. The lighter NC reduces the risk of running wide in corners. I have no complaints about the power and I knew going in there was going to be a reduction. I am happily surprised with the way the NC makes power.
I do have a couple of complaints about comfort, but that is for another thread.