Learning that the dev team didn't test with anything but 0 ping until COVID made me almost fall out of my chair. I worked QA at a small time language learning website and even we knew to test with all kinds of connection qualities. I really hope they decide to finally take a look at this. Even with my 85ms ping maining BLM weird things happen sometimes; for example, on some days I'll use Ley Lines, my character will do her animation and the ley lines will start to appear on the floor, and then the ley lines are gone and the cooldown hasn't been triggered. It's an instant cast skill, so it's not like it can be interrupted. I can only assume my using a GCD overwrote the fact that I had used Ley Lines during the global cooldown, which is incredibly strange behavior! And don't even get me started on the delay on using items.