I played on
The Rathe Server with well established rotations for 5 years.
Had a full rotation set up from way back. It worked pretty damn well and allowed 7 or 8 raiding guilds to get steady loot.
It was actually brought up and supported by the server GMs. New guilds came and went but always had a shot at raid content.
Instancing means everyone that wants one can have their own generated raid target and it's loot when they want it. It diminishes the value of raid targets and their loot. It was the beginning of the end for EQ Live and it would be the same here. Why would you even consider going down that same road?