Well, I've seen some guys say they removed it and 'shoved it' down in the headlight cowl, so maybe you can try that as a temporary 'trial'. It will at least provide you an opportunity to see if you notice the wind difference, as well get a feel for it being a bit further out from your face / eyes. I was very hesitant with all the mods I've done to my bike.
I'm one of those guys who doesn't venture to think I can out-think the engineers who get paid the big bucks at companies like Suzuki. I usually keep things stock on most my bikes and cars. But - With this one, I have to say - The engineers at Suzuki should be embarrassed that they did not place the tach in that location from the start. Perhaps they were all near-sighted..? Couldn't read the tack moved 12 inches (or 25cm to them) further out..? Just a guess.
In my opinion, it definitely belongs there. Kudos to those here on this board for figuring this out..!