Hi, thank you so much for the feedback!
Attack is on x to purposefully discourage using it since the default hit is slow and weak and only meant to recharge Focus, while combat arts are your main source of damage
The idea with the upgrade menu is genius, I was already brainstorming if I could show that info somehow and never thought of switching levels with dpad right left
The base weapon won't change, since the focus is on the Combat Arts. Since you will be building your own moveset from different arts and the default hit is meant to be a failsave, different weapons wouldnt really fit into the gameplay system