From everything I've been reading online, it looks like early user reviews are indicating that the bike's handling is its biggest improvement. Apparently it, weighs/handles much like a 600, with very little need for counter steering. The videos seem to indicate as well, that its out of the corners where the V4 really shines.
It is after all a product they refined on the track to finally bring to a retail level and just as they came up with innovations like that crankshaft I guess the same effort applied elsewhere. It too them many seasons of racing to fine tune the crank system alone!