Riiight ... except that, AFAIK, no experiment has ever found that any lepton has a structure different than that of a point.Sorry you'll have to do better than that. His proposal is that leptons are 2 dimensional and can change shape or size this is not to make the math easy. You will have to read most of the book to understand all of the derivations. Your opinion is not correct.
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But perhaps you know of experiments which show that leptons do have structure ("are 2 dimensional and can change shape or size")? How about you post them, or links to peer-reviewed papers reporting such things?
