When there was major publicity regarding the age-gap/gender-imbalance, FFB girls realized that they will need to give in on some things. For example, many single girls who otherwise wouldn’t have dreamed of marrying a divorced guy etc. agreed to give it a try.
This is obviously not a real solution, because now the divorced women have a harder time getting remarried.
It also also likely that the age gap was slightly ameliorated thanks to NASI’s or LIBBY’s efforts. Personally I gave preference, and ultimately married, a girl closer to my age due to the publicity about the issue.
There is also a “Torah B’tahara” initiative. But that isn’t attempting to solve the shidduch crisis but rather the “Shulchan Aruch crisis.”