A priori I am against a shifter as I feel more "sport like" to use the clutch instead (but I've never tested a shifter). besides I guess that the more the engine depends on electronics such as the shifter', the riskier of problems may be...
HOWEVER when I read the above and listen to the riders who join me with their bikes with a shifter (such as one with a xDiavel who loves it so much that he "can't" understand why I did not get one for my R3R), I am getting more and more curious.
The good thing is that I find out that a shifter can always be added later on. Would also ask for the dealer mechanic opinion.
Bottom line : would my R3R with a shifter result systematically with more excitement and only advantages or also with some disadvantages ?