yankel, as you, I acknowledge variety of opinions about L Rebbe with minor comments:
> product of years of university studies without yeshiva studies
whoever said that is probably somewhat biased – several years that L Rebbe spent when he was about 25-30 y.o. in U of Berlin and an engineering studies in Paris were way past his yeshiva years.
overall, criticism coming from people who did not show same level of care about Jews as a whole can be disregarded. Not because they are not knowledgeable in Torah – but because their views do not take into account relevant issues. Maybe a good analogy is a sanhedrin requirement to have
young children to make sure the judge has rahmonus.