Funny you say you wear a Schubert, me too , and I find it noisy with a screen compared to my open face.
On my naked 1290 sdr it is great though...
The givi is a very good screen, with loads of adjustment, I love mine and would recommend it for your bike.
The low rev thing is easy sorted with an xtre , by healtec, and it has other advantages in that you set into fourth gear, takes ten seconds, and you get full power in the other gears.