I've played about the same number of hands as you have on this chart, and the one thing that has made a difference for both my lines is raising a bit more aggressively on the hands I play. This is good for both lines like so. By aggressively I don't mean raising at every street, because I still want the information to be had by checking depending on context and position, but simply raising with higher values.

Here's what I've seen.

1) On many hands people fold rather than call. At first I was concerned because in theory I might be losing money here. When I have the nut, I'd rather hook them all the way to showdown. Nonetheless, this has been good for my red line, keeping it shallower.

2) On the hands people call (and that I win), I win more, leading to a steeper blue line.

I'm still a complete donk myself, so I don't submit this as advice to you walker, but rather as an idea for further consideration and comment by the experienced.