DY: They seem to be OK with the freezer concept, this is just an extension of it. To help so many girls, it would be worth a try (or other ideas, like opening the freezer for older girls), unless the result wanted is what is currently in place.
In addition, there is no “second option” for most learners returning from EY who are looking for a shidduch. Until that option is created (and who exactly will be the Rosh Yeshiva to break Lakewood?) the boys will not go anywhere.
Last on that point, the idea will/could open the freezer for going out with older girls. Granted it may be “Tagrei Lud”, but IMHO many boys will take that over the current situation.
I believe you are incorrect (and apologize if the language offends you) regarding the shidduch crisis having nothing to do with the OP’s original point. The shidduch crisis is strengthened by the support issue. The first sentence of the OP:
How are those who are learning full time now going to marry off their daughters and support their sons-in-law in learning?
The simple answer is, marry boys who aren’t learning. However, that doesn’t seem to be an option at first, and when it does come around, the girls are already “older” (This is not to say girls looking for workers do not have similar issues).