Although I like the idea of focal cryotherapy, four cores of ‘4’ is pretty substantial - and those scores are just from the targeted cores.
Also, the percentages of abnormal cells is also a factor. A higher number could indicate more neoplastic tissue present in the rest of the gland.
I only know one person who had cryotherapy and it was done by a surgeon on Long Island, NY who was a loud advocate for the procedure. It did not turn out well for him and his cancer became oligometastatic.
Of course, this is only ONE case and there are probably many successes. Your surgeon is correct, however, in that cryotherapy usually requires more procedures in the future. Best of luck on your decision.
Phil