I see a few issues, one being that there is no feedforward idle torque (air or spark) defined in the file, at least not on my version of HPT.
But the big issue is likely the new throttle body. There's a good chance it's not actually doing what you've entered for bench flow and sonic airflow model calibrations. If you say your throttle body flows more than it does, then it will pull the throttle further closed until the idle PID pushes the error into the integral after startup. This is probably why it happens when you come back to a stop as well...all of that air has been ramped out of the integral term. And when you load up the power steering, it will respond with less TPS adjustment versus the torque proportional request, making idle sag a bit.
I could show you a few ways to fix this, depending on how much work you want to do. There's the correct, difficult way, or a couple bandaid easier ways you could try. I used to be a calibrator for Chrysler so I still have some tricks up my sleeve