When you travel between two regions with different rules, the second region will gain the first one's for a few hands. Then one or more of the rules is randomly dropped. Reset if the bad rule is kept. I used this technique to eliminate the random rule from almost every region. As annoying as plus is I can cope with anything except random.

If you do the queen of cards subquest, reset every time she goes someplace other than Balamb or Dollet. It minimizes the headaches of changing rules.

Also try to avoid the combination of direct and open with players holding rare cards. They tend to play their rare card last to avoid losing it.