MC and Leia seem very unlikeable in the reworked narrative for now, not to mention that MC in general seems like a stereotypical Chippendales pretty boy that is an asshole to boot.
I think that's by design.
Leia is clearly very pissed at Will for leaving. There's a whole story there, hinted but not told, but it will in time.
William used to be a first grade asshole, all the stories from before he ran away confirms this. He changed somehow while he was away from his hometown and met Miru. Think of the difference between his hometown friends, all strained relationships, and his new-town friends.
As he comes back home he unintentionally picks back some of his bad habits. This happen to everybody as our brain ties emotions and habits to places and environments. Miru continously notices it and even outright tells Will when dealing with Katie.
The story picks up right at the crossroads of William's life, he can go either ways. He can go back to his previous asshole self or straight up himself but to do so he has to face his demons.
Anyhow this is just how I see it.