I found this while researching the launch of the new X-Men in 1975. Foom #10 had a special X-Men issue, and Marie Severin drew this great cartoon:
Severin drew Len Wein, Chris Claremont, and Dave Cockrum getting roasted alive by Marvel's fans--for replacing the classic X-Men team in Giant-Size X-Men #1. They were indeed apprehensive about kicking out Angel, Marvel Girl, and Iceman! No one could foresee the tremendous success that would befall upon the new and improved X-Men. Nuff said.