To a point, this is possible. BUT, if the rear subframe tube lengths aren't changed you may end up putting the swingarm (and driveshaft joints within it)
at a more severe angle, which might have a tendency to shorten the lifespan of the joints/bearings a bit. And this will tend to try to pitch the bike's weight
a bit more forward onto the front wheels, which you may not want. Easier to try different seat options that won't mess with the frame geometry or weight bias.