Before you make suggestions to fix a problem, I would suggest you define the problem. When you do define the source of the problem as an uneven number of boys and girls in the parsha due to vast differences in the ages of their marrying couple by population growth, you will realize that all of these feel good answers although all beautiful in concept will not affect a solution to this problem. If there are more girls in the parsha how will changing expectations get them all married. The solution has nothing to do with expectation, level of religiosity, or any other factor short of changing the dynamic to ensure boys and girls are marrying closer in age so that there are equal amounts of both of them. It is really important to understand the root cause of any problem before offering solutions. It is however a noble idea that you say in any case.
