People that beat the content beforehand already GOT their reward. It was called: 'Having the awesome loot before everyone else.' It's no different than buying a new game for $60 when it comes out. A year later when people get it for $20, do you get pissed off? Yes, they are getting it for less than you, but you got to play it before them.

It's the same thing here. You worked hard and got your loot before everyone else. And now, you'll get to go plug away at the new content before all of those people and(likely) get the new loot before them. Congratulations.

Why do you need something else handed to you?