I share this concern, but a little differently.
They've been scoring a lot, but in the half-court its really just Lipsey driving and JJ backing a guy down. That isn't going to be very effective vs really good teams. So those games, you have to either get lots of points of TOs (which they can do) and/or shoot the 3 well like 40%+ (which they can do).
But there will be games vs teams with good guards that don't turn it over, and they won't hit crap from 3. And those are gonna be a problem.
The glass half full though is they can beat you either with defense (turning you over) OR shooting the 3 at a good rate. It's a lot like last year.