If it not working, make a change. Buffetting of your head while riding is not pleasant or good for you. Noise is not good for your hearing. I would remove the windshield and see if it improves. Zero cost. You might also search here for others that have changed the height of their windshields. Cost depends or brand and size but you still have to install it.

You can only throw time or money at a problem that can be solved.

 

I put a taller windscreen on my 25 DCT and it seems to be better. I also have the Corbin Dual Tour seat. I’m 5’9”.

 

I don’t really feel the “shake your head around buffeting”. I the wind is being divided around the lower edge of my helmet. I think little eddy currents are creating noise. I will take the stock windshield off and just run the fairing and will report back

 

While riding, raise a hand in front of you.
You can feel where the wind starts.
That height is full of wind turbulence.
That changover height should be either below your helmet, or above.
When it is at your helmet height, you will get a lot of noise from that.
A way to cure that without changing your screen, is to add an extension screen.
That adds a slit in the screen, reducing tge turbilence, and can raise the turbilence height to above your helmet.
Example:

https://a.aliexpress.com/_EjzBQOS

Just clamps on your screen, no need for holes or glue

Greez
Moh

 

My wife rides with a little screen on her Rebel 1100 and I ride without a windscreen most of the year on my FJR1300.