I only ever raided in TBC (as mage) I didn't use any raid frames. I used a special addon for decursing.
Of course I was only fireball spamming 99% of the time. So my UI was EXTREMELY minimal. There was pretty much nothing on my screen. At one point I even made it so non-crits wouldn't show...so all I saw on my screen was crits, no dot ticks or non-crits. I got to enjoy all the visuals to the max, and the only numbers that popped up were crits. Feltgoodman