Thanks for the feedback!
Controller support overall is very WIP right now so if you use it over keyboard expect a few bugs. We'll keep pushing improvements to it over development and definitely have these issues sorted out before Steam release. Keep giving feedback on it though! There's always suggestions or a demand for a certain feature that we might have overlooked.
We definitely want to do a pass on the UI to improve readability as well for things like Stamina as you mentioned. Last patch we added a new reload reticule to the crosshair so we'll keep adding small improvements bit by bit.