What does G-D want is the question. There is no question that we need the leaders of our generation to guide and advise. Somehow, I don’t think having fewer children is the proper approach as that is pretty directly against HIS word.
As for encouraging more close in age shidduhim. That is very doable and effective, there should be no reason not to. Although some members of the CR seem very reluctant and don’t seem to get it, you clearly do.