I should add that you say that we’ve combined the worst of both, but I don’t see how the modern system (which isn’t really much of a system) works any better, or would work for BMG type yeshiva bochurim and BY girls.
And I don’t think the chsssidish system, which does seem to work much better in terms of setting up matches, would work for American litvish style bochurim in terms of sholom bayis.