Ruben, if ppa:vanvugt/unity fixed your CPU issues then you probably had bug 861061 which could also cause high CPU.
If it was ppa:vanvugt/compiz that fixed most of your CPU issues then I am unsure which change is helping you. But I would like to know... If the CPU was high only when moving windows then that is bug 764330 which is fixed in ppa:vanvugt/compiz. Otherwise I'm not sure which change reduced your CPU usage.
Certainly the change in GPU temp strongly suggests it is the fix for bug 861061 helping you the most.
Ruben, if ppa:vanvugt/unity fixed your CPU issues then you probably had bug 861061 which could also cause high CPU.
If it was ppa:vanvugt/compiz that fixed most of your CPU issues then I am unsure which change is helping you. But I would like to know... If the CPU was high only when moving windows then that is bug 764330 which is fixed in ppa:vanvugt/compiz. Otherwise I'm not sure which change reduced your CPU usage.
Certainly the change in GPU temp strongly suggests it is the fix for bug 861061 helping you the most.