Hi Jason,
I don't have an answer for you with respect to the CEC control, but we (Chowmain Software) have started to develop an Android TV driver for SIMPL (we already have one for Crestron Home) that addresses a lot of the annoying automatic behaviour of the various Android TV devices (like recovering from the Wallpaper mode, odd power on states, etc). It also has app discovery and launching so hopefully that will be a better option for control going forward.?