A DASH-8 is better suited than a P-42 is for switching, that's for sure. The P-42's are very slow to load up, and when you're talking about just trying to pull the slack out or bunch em up it's a pain in the butt (especially in a yard like Sanford). You also have very poor visibility when you're backing up, and IIRC it's against the rules to ride the ladders on them, whereas most other engines are built for it. However, the DASH-8 is far from suitable when it comes to switching, for a number of reasons. Compared to a motor like an MP15 the sight lines are horrible (but better than the aforementioned P-42). Also, if you want A/C on these units you have to run the 480, which means you're wasting a lot of fuel since the engine runs at such a high RPM rate. The Turbocharger also makes things a bit tricky since you can lose control of the train quickly (unless you're really really good at what you're doing) when the Turbo kicks in. These motors are still also geared to run at 110 MPH, so the ratio is not even close to what a "standard" switcher gearing ratio is. As stupid as it sounds, the best switchers are the things that were built back in the 50's and 60's that are (relatively) low horsepower de-turboed engines. The advantage to having the DASH-8's scattered around the system for switching in relatively small outposts (like Hialeah, Sanford, Portland, and Seattle) is that they do have the full ability to step in for an ailing motor and get the train over the road (HEP and all). Should Amtrak order more of the like as switchers, absolutely not. But they do the job they're asked to do pretty well. Should Amtrak consider some HEP'd ES44DC's for Auto Train, I think so...