Everyone was horrified, how low the boy’s magic was and that he had to produce his own magic. The Potters, Sirius and Remus were furious, what could have happened to John, because of Harry’s selfish desire for family. Harry was going to pay for this. But now they had to wait until their pup/cub/son is waking. Albus on the other side was thinking, how was the boy supposed to defeat Voldemort, if he was that weak. John was the Chosen One, wasn’t he? If not, then everyone was doomed and all of his plans are destroyed before they even started working. The only way to fix this was to get the other boy back and force him to re-bond with his family. In that way, John could become powerful again and would get the magic he deserved.