I agree I'd like to see how many charges we have in some way. Aquaveil is a really hard thing to test (no one has tried yet from what I've seen). Since Enhancing Magic skill also effects your general spell interruption rate, it's hard to tell what was prevented by skill and what by Aquaveil. I think it was brought up a long while ago they didn't want to make that many icons (or maybe it was about Blink/Occultation shadows). At the least they could reveal to us how Aquaveil works and what the formula is.