DCC is still to more complicated and you need these RF interface boards to connect to your decoder. Not much room for the extra stuff. The RailPro wireless has one board for radio, control and sound, about .5" longer than Soundtraxx, WOW or ESU. Also they eliminate dealing with CVs and indexing by using plain English and icons on the touch screen. Yes this is another handheld to get.
Coming from the G scale world this capability is now available for O scales. The radio signal goes directly to each loco for control, sound and lashups. You can use your DCC constant track voltage or add a on- board battery. This is an option we now have. No more track cleaning, stalls or repairing complex wiring. I have done installs in 2 & 3 rail locos. Just a new thought.
Don