To me you yourself have now proven what has been said before: just make it all glass all the way down and show off those curves! I really like the shape of the perspex as you've got it in the top corners and towards the centre post. I'd just like to see a full glass version without those (in my humble opinion) distracting metal trim pieces. Or if need be just a thin edge to locate the screen and keep water from going underneath it.
Looks good, even better then without the screen!. I would also worry about vibration or flexing but if you have it curved a bit like you did, it will be pretty strong. I used to have BMW R100 RT and my Ducati also has a rather high fairing and these are only connected on the lower part of the screen with a few 5mm bolts and these bikes can run 160-170 km per hour. Your screen has a frame so the glass is supported on the sides so it should be strong enough