Well the thing with those "enabled EAC on Linux to see where it gets us" is it's non-binding and non-commital. And it's made explicitely that way so that support cannot be demanded from Linux users unlike Windows users who are explicitely mentioned in the systems supported by the game.
We legally don't have any ground to be supported the same as Windows users.
This. It's not easy or trivial but as a long term strategy, they should already plan investing efforts into consolidating something like Godot or another FOSS engine. They should play like you calm down an abuser you can't just escape yet while planning their demise when the time has come.
How can an AMD sponsored game that litteraly runs better on all AMD GPU vs their NVIDIA counterpart, doesn't embark any tech that may unfavor AMD GPU can be less QA-ed on AMD GPUs because of market share?
This game IS better optimized on AMD. It has FSR2 enabled by default on all graphics presets. That particular take especially doesn't work for this game.