This kind of expands upon the idea of increasing the cap. I feel there should be a change to a cap per week. For instance, I work 10 hour days and by the time I get home I can be too tired or just not in the mood to do anything. I basically lose out those 2-3 dungeon runs for that day. The current limitations are pretty bad as is, but when certain circumstances prevent you from playing on that day then you just lose out. It truly sucks.
Why not make a revision to cap it per week? 14 runs for the week for free players, or 21 for token users. That way, if I have a free day off and just want to play the game for hours and hours I can still get the most out of my runs.