I worry about that as well. The 20 year old is the one doing the babysitting on that pairing. In the short time he has been up, they've already almost given up a few goals because of Redmond's mistakes leading to odd man rushes the other way.
I actually see the babysitting Bigras is doing as a good thing. You know a few years from now, we might have some young guy that has some skills but needs a partner that can babysit him. Bigras is showing at young age he is able to be the consistent/reliable one on a pairing, it's only going to make him better when he gets an opportunity to play with some higher quality players, and it also gives the coaching staff confidence that if they have a need for this type of babysitting/mentoring in the future he can fill that role as well. It's kind of like what Beauchemin just did for Zadorov, except Beauchemin probably wasn't capable of doing that when he was 20, which is why it super impressive to me what Bigras is doing.