You know, my first reaction to this was "I kind of *like* grinding and getting good at one or two quests for the whole week", but I was specifically thinking of Silent Afterimage 2 where I enjoyed learning how to unlock all the secret areas of the quest and showing other party members how to do...
I'd be in favor or expanding the quest list. 'Bad' quests like East/West Tower don't even need to be removed if all quests are in the rotation- there will just be some weeks with good/broken quests and some with bad quests and that'd be fine and balanced when seen over a long period of time...