Well, let's have a discussion then. I'll lead with a few questions:
- Isn't your definition of 'harder' content a personal one? Requiring more coordination, maybe, but many gamers like myself see absolutely no challenge in fighting an AI mob after the third or fourth attempt, due to the repetitious and outright predictable behavior of ALL NPC's. In following this logic of 'more risk = more reward', than only PvP would offer the best rewards in the game, because of the basic unpredictable level that players bring to the gaming equation.
- Is four players grouping up and working together really harder than a solo player managing everything himself? The simple fact that a solo player has to do ALL of the requisite components of the holy trinity (tank/damage/heal) means that simply the challenge of completing content would be more cumbersome and difficult. In the end, appropriately scaled, would not solo content reward a player more for doing what it takes four players to do otherwise? Appropriately scaled, that is.
- When you refer to rewarding team play, do you not understand that this punishes solo play? I'm actually all for group content requiring groups to complete. But in the same breath, signaling one playstyle (solo vs group, pvp vs pve, loot vs crafter) as superior to another and deserving of more reward essentially punishes the other groups preferred playstyle.
All in all, I'm more or less playing devil's advocate. I think the solo and group rewards SHOULD be equal. I also feel it's a subtle balance on challenge and skill that i doubt ESO has achieved yet. But they SHOULD be balanced, in my mind.