Simple, add perma death, no special anything or blizzard support, no transfer to or from just perma death. When you die you are deleted instantly, tho maybe allow your bank to remain. With the huge gap left for the next xpac im sure there are lots that would enjoy it. Would be interesting to see how far guilds can push content and such. Sure would have huge excitement while playing, the fear of death, taking encounters sooo serious like you never would have before. Gear would take on a new meaning and status symbols