If he likes his teammates and enjoys playing on that team keep him there. A move now could actually ruined his career if he does not have a good time playing. I did this at the Bantam minor year with my oldest boy and he really did not have a fun experience playing with new kids while going through puberty. Should've kept him on his subpar team and just let him perform.

Quit beating yourself up. Worst case, you hastened what would have happened at some point in the not too distant future. Hockey is a sport that is filled with adversity, so if he was weak enough that he couldn't accept new teammates at 13, chances are the outcome would have been the same at 14, or 15, when he finally had to leave the comfort of the nest of Youth Hockey.

I think with the guy is saying is unless your kid is a total stand out and is being recruited by every prep school around leave it alone if the kid is happy. It's not gonna matter much.

That's a cop out. Kids improve a lot from 13 to 16 by working hard and seeking out new opportunities. It's a critical time from a development standpoint. It isn't about "being recruited by every prep school around." It's about putting your kid in a position to make the most out of the years has left.

God, what a bunch of panty waists.

Bantam Minor year is a critical year for skills, teamwork and most importantly for the players mindset. Vary rarely do you see a serious injury due to a hit during this year, but getting knocked down 4 or 5 times a game can destroy confidence and a kids mind.
Make sure to work on mental toughness just as much as the physical.