Ron is correct. I wouldn't rip out any wiring until you try it as is. Sometimes it works. Some users don't understand why and give up.
I would recommend pulling all powered equipment off the rails for the test. Sometimes a piece of equipment can cause issues that end up getting blamed on the wiring. You could also try adding DCS to just a portion or loop of the layout rather than everything all at once when possible. Having it go to sidings where many pieces of offending equipment are parked can be doomed for failure.
I don't know if this has been posted here before or not? I would separate sidings for what brand or pieces are expected to be parked there. Don't have a main single channel of the TIU's signal dragged down by a siding. Use all the channels possible. Greg from Canada taught me to look at that without stating any brands or problem pieces. He posted (something like) why not use all the channels when you have them right there?
I had my whole layout on a single channel at first. As the layout grew the signal strength started going down in certain areas. So I had to look at what was happening.
