You might notice it because shaving the seat lowers your center of gravity - however only slightly while sitting down on corners, etc. You might also get a sore bottom since there is seat less foam.:scream:
Shaving the seat does make the bike handle better.
1) You ARE lower to the ground...lower center of gravity, makes mucho difference.
2) Being able to touch earth (while seated, of course)gives more confidence/control.
3) Bike looks like a cool freeride machine. :confused: