In the reading I have done, I can't figure out if there is an advantage for me to try MCE. I mainly fly A2A aircraft like the Comanche, AT6  and C 182 or the Connie. I either use PF3 as my ATC or Vatsim. I guess my question is, since I don't normally use a co -pilot on any of these aircraft, is  MCE  worth trying for this type of IFR flying and aircraft?  

Im a big fan of MCE, indeed is more useful in airliners where a co pilot can be very help full, if you have PF3 you can use it to talk to atc, MCE supports PF3, but you can do a lot more with MCE, controlling GSX for example or even the views.

I would suggest you try the demo available in the their page