Rick, sounds like you got your back up TIU around the same time I recently got my 1st, which was included in my DCS Remote Control Set that I purchased from my LHS ((last one they had) about 1 month ago.
I was motivated to get it by my last few Proto 3 engines I purchased during the past year which, IMO, are terrific locomotives, and the imminent closing of MTH.
Besides the prototypically slow smooth performance of Proto 2 and 3 engines running on DCS, the simplicity and flawless performance of the electrocouplers using the DCS Remote greatly enhances switching maneuvers on my layout.
I have come late to the DCS party, but am now as passionately positive as anyone about it.
I have only used the basic Dcs functions, which I am enjoying. Down the road, I will explore its other functions, especially with "A Little Help With My Friends," that's you folks here on the Forum.