Yeah I agree; the sliders are disproportionately fast for a Normal, and SV 0.8 is more suitable.
To the mapper: Changing SV will significantly impact your map. You gotta readjust all the sliders and hitobjects Distance Snap.
After reducing SV from 1.00 -> 0.80, select all hitobjects then scale their spacing by 0.8x to accommodate the new SV. After that you might wanna move some objects around to utilise the entire playfield again, and/or re-space the objects back to a higher Distance Snap spacing (maybe 1.1 or 1.2?) to fix visuals.
Lemme know if you need any further help