Nothing wrong with the older hardware version.
It doesn't mean it is bad.
I just suspected, Proton changing some of the components therefore differentiate it with different version.
The base has not change, this is still SX11A0, so it wasn't an upgrade.
To be honest, for executive and standard, there is not chance to downgrade at the moment due limited resources.
For FS and Premium, there are possibility to downgrade as I know, however with slight change in hardware, I think it is worthwhile to check further.
For new batch of Flagship models that come with ATLAS from factory, any confirmation so far that can downgrade back to GKUI? Or still untested so far?