As for Yue Fang... Am I the only one who doesn't see a problem with his power? I mean, I don't like him and I think he's way more arrogant than he can afford to be, but his power makes sense because the guy literally had one of the best backgrounds, development, and resources possible. Even Ruo is a beggar compared to him. It's even unfair to compare the MC to him because they have very, very, very, different starting points. For Yue Fang, it's probably not even that he's actually getting stronger, but rather that he's unlocking the power he already possesses.
If POMA weren't subject to daily retcons, I would even dare to say that if Yue Fang were a native of the same world as the MC, he would be a He Gang at most. In my eyes, characters like Yang Gan deserve much more “respect” and, honestly, to be debated whether their strength makes sense.