I think we should consider term limits to the coordinator positions.
I can think of two ways to do it:
1) no one can hold a single coordinator position for more than 2 years. After which he/she must take at least a one year break from *that* position before he/she can run again.
2) no one can hold any coordinator position for more than 2 years. After which he/she must take a break from coordinating all-together before he/she can run for a coordinator position.
Personally, I think #1 would be sufficient, but thought I'd present #2 for completeness sake.