Fours are a little bit "fizzy" anyway and with no rubber in the engine mounts you're going to get some through to you, but anything particulary unequal must go towards increasing that.
I don't recall having any particular feelings as you describe, but a friend of mine who rode them at the same time as me has more recently found that his tolerance of this is much lower now than then if that makes sense.
One contributor to the feeling at the bars is a lot of newer stuff runs with bar end wieghts that specifically try to damp that effect out, so could account for some of the difference. Also the vibration masses are smaller on new stuff anyway.
My feelings about picking up vibes can often be an early detection of some inbalance even if power is unaffected, so worth a reasonably careful check through settings to make sure nothing is far away from spec.