Actually, I'm curious to why you want to restrict it to raid leaders. Maybe in your own static you will think it will work very well and are projecting, but I have objections for the reason that you assume the raid leader knows best.

In my experience sometimes raid leaders are the ones letting the group down, and are already using the skill of their members and their power as a leader to hide their own lacking ability. If they play dps and only they can see the parser then this just adds to the unfortunate situation. These sorts of groups are dead-end groups and it takes weeks of 0 progression for people to realize it, it's why I favor total transparency so no one in the group is above criticism.

Also I mentioned it before but there are t5 farmers out there that don't play in statics, rather in loosely formed, closed circles of players. The idea of exclusive leader functions seems to assume everyone is in a static. What do you think of these two points?