An MGH below 80 doesn’t allow additional chances for flying. It’s only once MGH is between 80 and 160 that it allows additional crew to fly.
The real question is whether the pilot group is prepared to vote for a lower MGH AND to allow training onto a type so that more pilots can get flying.
Again, a lower MGH that devalues future leave accrual would need to be part of a package that includes such considerations.