1) the power readings are artificial because of the smoothing. If anything, the Direto numbers probably reflects a better look on reality than the kickr in erg mode.

2) i've had no issues with erg. I do almost everything on the small front chainring and keep it in the middle on the cassette. Only had to make a big gear change when doing a ftp test when TR automaticly shifts to the resistance mode

3) only had a 'wobbling' issue after moving the direto around with the bike still attached. Easily fixed by leveling the direto out using the big round knobs on the bottom side of the legs.