I think the inflammation will go down with time. You said your still getting the white line so the lips might not be completely finished the peeling cycle (even though you don't have any buildup).
Part of me really thinks that our bodies have developed some sort of a disorder and that changing our lifestyles could be the only way to heal this, with the no peeling and moisture method of course.
The other day, I started thinking... I never see older folks with EC...NEVER. The mild forms of EC are pretty common, I have a few friends who have it but they just peel the skin and it isn't bad at all. Obviously our EC started with trauma but I keep thinking that due to the habits developed by our generation (unhealthy eating), we may not be able to heal properly.
I read somewhere (i think reddit), that the early people/hunters never developed gum disease. It only came recently when humans started eating a lot of processed foods. Maybe something could be happening internally in us which could prevent us from "fully" healing.