Editors are either gods or demons to writers. There isn't much middle ground.
I got my first edits back on Love Ruins along with comments from my editor. She is questioning part of my story that isn't clear to her. Now, while I did explain it to her, I've given this some serious thought and I think a rewrite of that entire section is called for. Why? Because if your editor is saying, "Huh?" then so will all your readers. So you have the choice of going around to each reader and explaining what you meant, or you make it clear in the book and save everyone time and confusion.
It does have a cascade effect. It changes a later scene, and it changes some stuff in the third novel, but honestly, while I love my readers, I don't want to have to go to each one and have to explain that scene.
This is what being a published writer means - taking critique and acting on it to improve the story. Forget having a diva moment. Forget wailing about art. The editor is right. It has to be fixed.