In general, a lower stack height on a bicycle will improve handling because more weight it placed on the handlebar which brings weight distribution on the bike closer to 50/50. Of course too much weight on the hands is hard on the hands. Pro riders and top amateurs can run a slammed front end because their pedal forces lighten hand pressure even with a lower front end. Same dynamic with a motorcycle and why cruisers like Harley's will never handle like a sport bike...all the weight is on the back wheel and the trail and fork rake have to compensate to slow steering.