I totally Agree with you my friend , this will bring more Peace and more chances to get DBs but don't forget that it'll make the game alot easier , anyway i'd go for a week which 7 days ( 7 days = 7 dragonballs ) so you only Wish once every two months , this will be GREAT.
I actually didn't have a problem with the way this was in retail. I enjoyed the DB hunting hours, and often found myself signing on just to do this event. If it was always on, it's just one less reason to 'check in' once in awhile for those casual players. Not all of us are hardcore. The drop rate was already crazy low, and I think it was just fine, IMO.