In fact, there was no consideration or expectation of him achieving more than that. The best he and his father thought he was capable of was getting the force diagram. But his father is considering that Arthur will enter a sect.
In fact, his father is doing more than considering it. His father is hoping for it. That way, they won't have any problem with Arthur ever again.
Skylar just couldn't swallow that disparity in their situation. But he needed to swallow something because his chest felt stuffy and his tongue felt dry. So he picked up the cup of tea and drank everything in it all at once.
When he was done quenching his anger with tea, he asked his master, "How strong is "Master Red" now?"
He made air quotes when he mentioned the title of the owner of the Red Dojo. In his opinion, Arthur is just a child and shouldn't be called a master.