So if I am reading this right, the copilot was surprised by his actions having the exact consequences you'd expect, given this collection of input/output data? Eg. mostly left roll input, airplane banks left.
Or did he maybe expect higher roll rate from the aircraft for his inputs? I know this is just a preliminary report/investigation update, but seems like there was not much wrong with the aircraft.
About the fact that they did not notice their conflicting inputs... I do not fly the type, so excuse my lack of knowledge on the exact flight control config on the 777. But is it not supposed to be one of the upsides of Boeings FBW philosophy, to keep the yokes still moving in sync and provide feedback?