Ours regularly flies between Darwin and Adelaide, so range is not bad for what is after all a single-pilot light jet.
The windscreen thing is a known issue but we have had no trouble with ours.
I’ve never had a fuel imbalance after using the single-point refuelling, nor the incorrect amount loaded.
The system is, however, quite fussy and if you are in a rush and don’t let it “complete” properly I can see how that may be possible. But I call that operator error, not a fault with the aircraft.
We haven’t had any issues with avionics / cockpit cooling. The environmental system is far more effective than in the PC-12.