The reason I don't use Flux at all is because I'm afraid it'll mess with my ability to work with colour and I don't want to have to turn it off every time I do anything xP
The text is definitely more readable now! I think a simpler O (without the corners filled, or with ALL corners filled) might be more readable, at the expense of stlishness, but I'm not sure.
I like the new HP bar. I feel like it might look better with the highlight only being 1px instead of 2, it looks rather pale as-is.
The exp bar (yellow?) works better with the diagonal stripes since precision isn't very important there. I don't think you need the dark brown in there though, it blends into the background. Or is it just there to serve as the boundaries for the empty version?
I think with the green bar being concave and with two segment sizes, you have too many textures going on in the HUD as a whole. It's good to rely on more than just colour and position to set things apart, but it's starting to look a bit noisy. I think the old, convex, simple segments worked better. Since the segments are wider than the ones in the HP bar, it would still have a distinct texture and thus be readable, without overcomplicating things.