I've been looking forward to this one for a while as well; the Aerosoft Beaver X is probably my all-round favorite plane in the sim, based solely on how she flies... but she's certainly in need of an update and I hope this is it!
That said, there's one thing in that promo video that bugs the hell out of me and I wonder if I'm the only one: at about 1:20, the taxiing Beaver makes a left 180 to line up for takeoff... and while the turn looks normal, when the pilot straightens the plane out at the end of the turn, there's no indication of any inertia at all. The plane simply straightens, perfectly, with no application of opposite rudder or brake to halt the turn. That heavy radial should have some momentum and want to keep swinging the nose. It looks like how AI aircraft move in the sim, just... unnatural.
I REALLY hope that isn't indicative of how she handles! But its just a promo video of a WIP, made to be eye candy etc... guess we'll know soon enough now!