At level 25, chest levels are still level 21 and 22 on many of the epic dungeons people are running. It's harder to pull renown playing the endgame gauntlet than it used to be. There are a few places to get high level chests, but typical endgame play makes it more difficult than it used to be to pull the renown needed for daily guild contribution. I probably run more level 24+ content and epic elites than the average player, but I still find myself pulling fewer and fewer renown rewards from chests as I level up.
The adjustment to experience overlevel penalties in level 21+ was a great for the overall community for promoting group play at the epic level. Please consider bringing renown up to speed similarly.
This quote from 2010 reflects the right sentiment. But the numbers support another review with an increased level cap but lack of appropriate level content.
A great idea to encourage us to run level-appropriate quests, but the fact is that many quests with levels of 22 or 23 are going to remain endgame for a while.