545 rfe trans easier?

I just bought a Predator tuner (U7137) for my setup. I have installed a 5.7 hemi and 545 trans from an 05 2500 truck in my duster. I was surprised to find that I can adjust shift points as well as kickdown directly from the tool. I'm not sure how the performance trans tune will affect shift firmness yet as I have the car off the road to finish paint and body work, but I am surprised by the number of transmission parameters I can adjust without having a custom tune. I'll likely get a custom tune at some point since I do not have cats or rear o2 sensors installed and I have read that this will make it run rich.