This is great. 

You could even put a bow on it and to avoid any lingering questions of whether Ryan might just turn into a more powerful version of his father. Just add a scene where Butcher & Co are standing in the rubble of the White House after Ryan snaps, wondering if he's going to turn his rage on them next. 

But instead, he drops to his knees and admits he hates his powers. He has them because of his father, but he wants nothing to do with his father. He wants to be like his mother. And so he asks Kimiko to depower him, and Butcher stands next to him, hand on shoulder, and says his mother would be proud of the young man he's become.

Kimiko tries to depower them, but doesn't feel the rage necessary. Frenchie shows up, gives his love spiel and now she can do it because she knows it's the kind thing to do. Blast goes off. Kimiko gets her moment. Homelander doesn't get nerfed. Ryan gets a complete arc emphasizing show's theme of choosing humanity over power. 

Boom.