I talked to my son later. He said he wanted to go low and away. Coach wanted him to go inside. I asked him why he wanted to go away. He said that Holm had changed where he stood in the batter box. Instead of being on top of the plate he was as far away from the plate as he could be. If he threw inside he would be in his wheel house.
My son also watches where the ump sets up. Depending on how low they get and how close they are to the catchers shoulder, helps him determine if he will get the inside pitch called.
This calls into question what does it mean to go inside, and what is the purpose? I've always viewed going inside to mean "inside relative to where the hitter is", ie to the point of tying him up. If a batter is off the plate then this would mean you have to come in off the plate. This won't be called a strike, but that's not always the reason to go inside. It would be a good set up pitch for an outside pitch.