The Beast IS rough. So? It's a feature, in my opinion. A coaster, racing through the woods, in pursuit of (or being chased by) a mythical, bear/wolf/monster, untamed creature. Very well designed, so well designed, in fact, that it appears to follow the terrain yet still have the hills and turns necessary for an exciting ride. Great tunnels. This is one ride that almost themes itself.
Just remember that the ride used to be faster and rougher, and the park has done an excellent job of maintaining it, so that well into its third decade, it is still going strong. They put a lot of offseason effort into replacing track and maintaining trains so that most of the roughness we feel is a result of the design, not deteriorating trains and support structures. The cars used to not have seat dividers, so you'd not only get slammed by the seat, but slammed into your ride partner, as well. The mag brakes in the shed bleed off a lot of the speed. I can't imagine taking the three right-hand turns leading into the second lift hill at the old full speed, and I can't believe I did it as a kid.