Redditor munk2 created an interesting concept of Leveling+ Seasons in WoW with old expansion content scaling to end-game difficulty and offering gear rewards relevant for current end-game content.
The concept talks about Chromie Time being updated with Seasons.
Each new leveling Season would be themed after an expansion, e.g. Season 1: Northrend
Each season would consist of the zones and story quests from a single expansion, scaled to end-game difficulty.
End-game difficulty would warrant gear rewards relevant for current end-game content.
What do you think about the concept?
Source: Reddit
