Just my 5c worth, it sounds strange to me that this nurse is pushing for a tonsillectomy. When dd1 was getting chronic ear & throat infections, we saw a specialist to see about having then out. His advice was basically "yes it may well help her but she can cope without having them out, it's totally up to you how we proceed". . And you said that he was much better in the last year than in the past except for this last bout? (or did I misunderstand?)
I would be concerned that you are bring pushed into an op?