Drop down to the 63 bro 66 is straight up big guy freeride size.
I haven't ridden the new Legacy just the SL its narrow counter part. The reverse camber definitely changes the way it rides for a positive in my opinion. If you're on a budget I'd say just get the last years for sure, if you don't mind dropping more its worth it in my opinion.
The new sidecut has really great edgehold on icy conditions and in the half pipe. The rocker because it lifts the contact points allows for you to not slow down as much in the flats. Preloading the tail is a thing of the past you can ollie on that board more like a skateboard. Buttering becomes easier too. Pow the nose will rise up easier. I've been riding the NS rockered boards since mid February and I haven't encountered anything with them thats bad. I've dropped cornices, jibbed, ridden CO pow and coastal WA pow as well, trees, halfpipe, jumps. Its a really amazing ride for sure.