How about this for a proposal...
1. Maximum number of shifts in a row that can be rostered or worked, including Standby, excluding Mutual Change of Shift, shall be six shifts. No less than two days off shall be rostered following a shift cycle. No less than four days off shall be rostered following a night shift. No controller shall attend for work following a night shift, including Standby, for a period of four days. No controller shall attend for more than six shifts in any ten day period. No controller shall be called to attend for duty during rostered days off.
2. One Standby Shift (Grey Day or Grey Evening) shall be rostered per month and shall be included in the normal rostered shift cycle.
3. Rosters shall be published three months in advance and shall include a period of twelve months of rostered shifts and Recreation Leave.
4. 48 days Annual Recreation Leave each year. No leave to be carried forward to subsequent years.
Pick a salary that is commensurate to what you are earning now with overtime and Market Forces determine. That is the salary that every controller, regardless of years-of-service, or position in the ATC management-determined social pecking order, will be paid. No management-discretion progression through increments.
Nothing left to interpretation and manipulation will result in no dispute, no harassment, no adversarial relationship... no morale problem. The service gets provided and everyone is happy.
Keep It Simple.