Guild Wars 2

Instead of introducing dimishing rewards for dungeon completion I suggest increasing the difficulty of dungeon bosses with every dungeon run per day.

As is:
A group runs a specific dungeon in 30 minutes, rewarded by 30 tokens for he first run, 20 for each subsequent. They need to run it just more often and get the same reward. This is boring to players and the only effect of the reward nerf was to get players more bored of running a dungeon and finaly wait till next day, because they were to bored to run once again. After the 5th run everyone gets tired, after the 10th run, there are wipes, because some people are asleep.

Increasing difficulty system:
A group runs a specific dungeon in 30 minutes, rewarded by 30 tokens for he first run, and also 30 for each subsequent. The mobs and bosses in the instance increase in difficulty (damage done and health) with each run by 10%. The second run is just a bit harder, but can be done without much problems. The 5th run ist pretty hard, the bosses have 50% more HP and hit for 50% more damage. The group is still on the edge of excitement, because every small fail would cause a wipe. The 10th run would be nearly impossible, because the bosses one-hit everyone and because of 100% more HP the fights take twice as long.

With this system, multiple runs are rewarded with tokens like the first one, but through the increase in difficulty, they are also rewarded in a better group cohesiveness and better teamplay. Through the continued increase, an infinite farming of just one dungeon would practically be impossible.

On the technical side, servers would need to keep track of the indiviual dungeon runs per person, for example through a hidden buff/debuff for each dungeon, increasing the difficulty for 2% per person and run.
Example:
Group in Twilight Arbor:
Player1: 3 runs: 3 stacks -> 6%
Player 2: 2 runs: 2 stacks -> 4%
Player 3: first run: 0 stacks -> 0%
Player 4: 5 runs: 5 stacks -> 10%
Player 5: 1 run: 1 stack -> 2%
=> result: Dungeon increases in difficulty by (6+4+10+2)% = 22%

Reset of each buff could be done after 24 hours (like the normal effect mechanic) or at a defined time (f.i. 3 am).

What are your thoughts on this?