The Caltrain DLC used to have a switcher where you did lots of general duties even recovery of locomotives and what not. Yard work was also assigned to this unit as well. I actually never got a chance to drive it because the entire DLC was gone. So the logical thing is to re-introduce it again but as an addition to exisiting american/canadian routes. There a few to put it work on already. The switcher already exists but needs porting over and updating. So it's a good idea overall.
Thanks for the correction, yes that unit is a no brainer. bring her over to tsw5, plenty of work ahead with amtrack even.