"Especially for Alliance this is a long, boring travel."
Are you kidding me? Boat, Portal to Darnassus, Druid's Teleport Moonglade, Dimensional Ripper - Everlook (not sure what patch it was added thou) and then relax while flying to Azshara. If you think that going there from time to time is a waste of time, then why do you play vanilla wow?
And come on - MC is 40 ppl raid... you do not need 40 essences for each raid, you could just make a schedule and rotate people responsible for Quintessence. - problem solved.