Alana:
Keep in mind that RPOL tends to front load interest, but it falters easily and attrition will happen, it is almost always best to have one or two extra characters in any new game.
Yes, player attrition is expected, the group is 7 right now. Staying 3-4 is acceptable for me. I can handle two campaigns at the same time, have plenty Palladium material so I don't think will run out of ideas any time soon.