It isn't all about talent in hockey. You need to have the right mix of skill sets on each line. Pendleton outlined it. You can't have three guys on a line that all like to have the puck.
I go agree that Brown and Hyman aren't the right combination, but I also don't think that Matthews, Marner, and Nylander wouldn't be most beneficial either. I think one of those two should replace Brown. And it'll be Nylander. Dudes been struggling, and Babcock wanted to put him on a line that doesn't have the tight defensive matchups all the time to try and open up the ice for him and boost his confidence back up before reuniting him with Matthews.