Hey all, it is my fault the updates to those 3 dungeon chains did not get into to the notes. There is a lot going on right now and as we establish our patch process sometimes things will slip through the cracks. I wanted to shed some light on the dungeon speed clear stuff as well. You should not see any diminished returns unless you:
1) Run the same exact chain over twice in a row
2) Complete multiple dungeons in 30 minutes or less each.
We also reduced the rewards of completing story mode, once you have already completed it, because the rewards for story mode were never intended to be a high as they were.
At this time, dungeons should one of the most efficient ways to level and get gold, and it is not our intention to make them feel like a grind. This is a very large game, and we have a lot of people playing it in many different ways. Right now we are working hard to make sure there are not any ways for players to circumvent the normal rewards in the game and then we will be able to look at the actual rewards and make sure they require a reasonable amount of investment.
Dungeons are meant to be difficult and we will continue to update them to try and reach a point where the time invested to XP/Gold/Tokens is similar for each dungeon. Some right now are just too easy to complete while others may be too hard. Moving forward we will try and post more clear change notes for those dungeons we do fix.
Developer Corner: Jon Peters on the latest dungeon update
Source: forum.guildwars2.com