In that case perhaps a fourth category the OP can add as an “additional societal casualty of the shidduch crisis” is divorced women. Since the divorced men are often marrying the never-married older single women, this leaves many divorced women with no one to marry.
Though, given that severe result, perhaps it will motivate more married women who are considering divorce to reconsider and instead to choose to preserve their existing marriage — since a divorce can often mean growing old and lonely with no one else to marry.
If so, this fourth category could somewhat alleviate the first category in the OP since it will result in less divorces in the first place.