At least with the handlebar bag you end up with something useful even if it doesn't solve the buffeting problem
Trouble is, airflow round your head is quite a personal thing. TBH it never even bothered me on a completely standard bike, but it drives some people crazy.
If you try searching for 'bird comb' on here you'll probably find some other solutions to the 'airflow through the forks' theory. As for the 'it needs a bigger screen' theory there's obviously a few on the market (metal mule, puig, etc) plus the Toura**** spoiler things.