One thing that has really come to head with the latest raid tier is how bad buff and debuff tracking in this game is. In v4S you the entire fight centers around you tracking a tiny set of graphics that tell you how to execute certain mechanics. The fundamental problem boils down to the lack of being able to really customize on your HUD where/how buffs and debuffs are displayed. First and for most - they both are displayed on the same UI element forcing you to really favor one over the other - these really should be separated into two UI elements so they can be moved and scaled independently of one and other. This would allow you to position and more quickly identify things without sacrificing visibility of one in order to favor visibility of the other.

This is my biggest complaint and piece of feedback from this raid tier.