I have an old quarq, ANT+ and not BTLE. I guess I could get a dongle. I don't usually have this bike on the trainer so I'd rather have the kickr just work.
Aaah, that is a limitation.
I believe that power accuracy was one of the stated improvements in the 2016 model and that the original did have recognized power accuracy issues. I am not sure I have ever read of a solution, other than the TrainerRoad PowerMatch approach.