Couple things for leases -
1. The default value for ability to renew lease on frames that are leased with a maximum limit should be disabled. Currently, if you put a plane out for a 6 month lease, the leasee can renew the lease upon delivery (i.e. out 15+ years) which fully negates the initial lease length limitation placed by the leasor. The only way to avoid that from happening is to manually deny the lease prior to delivery to the new airline, which is a bit of a pain.
2. Ability to limit renewal terms to a set time period (or perhaps to a certain date). This is helpful when there's a target window where a leasor wants to recall all ships to start flying. If there's a set time period (i.e. same type drop down as for the initial sale page), it should also default to no auto-renew, as per #1.