I probably have the same TRC 34560 Surge/EMS system in my coach as you have in yours. I have not changed out the OEM unit; it provides all the same functionality (as you mentioned). I miss the remote panel and line current indication on my previous unit with the Progressive Industries EMS HW50C.
Until the TRC fails, I cannot warrant the cost to replace with the PI.
Towr: 2007 Country Coach Allure 470 - 37 Sunset Bay Cummins 400 ISL
Toad: 2016 F150 King Ranch - 3.5L EcoBoost 4x4 Supercrew (curb weight 4,775 lbs)
Toad: SOLD 2007 Jeep Grand Cherokee (yes, it has a Hemi) (curb weight 4,720 lbs)