Time limit to re-enter dungeons

[Betelgeuzah]

And casuals would benefit more from a lock-out timer. Yeah that make LOADS more sense. Thanks for clearing that up.

Let me wrap this up for you:

Lockout timers enable the devs to increase the drop rate WITHOUT the hardcore population clearing the content faster than the casuals.

The drop rate can be as high as the lockout time is long. If you can do an instance once a week instead of once a day, drop rates can be sevenfold as well. Nobody is getting stuff done any faster, but those with less time to play benefit more from the time they put in.

It's not rocket science.