The further we go to the end, the less believable…

The further we go to the end, the less believable the wrapping up gets. Like for example, the guy who used the magical sword for years couldn't tell at all it isn't the real one, not even magical one. But the ML comes up with: "I broke it, I'm little familiar with it, show me." Barely looks at it in the sheath and can immediately tell.This episode also hinted Pei Yin might be Yuan's father. I'm really disappointed it was never adressed.But I don't take it so harshly, as it is visibly smaller and cheaper production.