With the 4 new -600's in service giving a fleet of 14, but a requirement for 11 aircraft from the schedule (not including any spare/maintenance requierments) and the remaining 4 -600's due in the next few months they will have a surplus of aircraft.
I'm not familiar with leasing agreements, are RE able to lease an aircraft out to another operator until the current lease runs out rather than paying lease termination fees costs?
If the intention is to get rid of the remaining -200's it's not worth starting new routes hiring new crew if the aircraft aren't staying to increase the schedule.