I'm honestly not sure why Polaris wants the 3.0 geared down to a 2.52 ratio.
My vote was - track warranty.
Saw the same thing when the gearing was announced, and was the first thing I came up with. Nothing blows up a pow track like speed=heat. Top speed on the dream-o-meter with that gearing might be 72, 73 mph at sea level, 65 or lower at elevation.