Who knows about the warranty ramifications by eliminating the US turn signals. It would seem unreasonable if a mechanical issue was declined under warranty, but if an electrical issue?
I'm 5'9", so the height might be real good for you. You'll still be able to see over the windscreen. I got no head buffeting on either shields, but I am trying to eliminate as much of the wind noise at speed as I can. Ordered an MRA spoiler to try on it next. Rode a friend's Suzuki "wee" strom recently and he had the windscreen set up on it where I heard practically no wind noise - very pleasant!