Not sure where you get your data, or what aircraft you consider in the MU-2 class, but for the period 2001-2005, the MU had a lower fatal accident rate than the Merlin, Dash 6, 7 and 8, Cessna 406, Piper Meridian and Malibu Jetprop
I said in the
same class as the MU-2. Not airliners like the Dash 6, 7 and 8 (theDash 7 is a four engine aircraft) nor such as single engine aircraft such as the Meridian and the Malibu. Compare the accident rate of the MU-2 verus the Kingair, Turbo Commander and the Merlin and see what results you arrive at.
On a personal note, I really don't care that much for any trubo-prop aircraft. I'm not saying I'd never fly one if I came out of retirment nor refuse to ride in a turbo-prop aircraft, I just don't care for them.
Funny enough I've never flown a Turbo Commander in spite of being based in Oklahoma City for all these years. I flew every other type Aero Commander ever built including the Jet Commander, but never a Turbo Commander.