I created an issue in the bitbucket, decided to duplicate it here as well.
Long story short - I added ISO, shutter speed, f-number and focal length to the navigator panel, here how it looks:
Git patch is included in the issue, however any critique is welcomed and I won’t have hard feelings if patch won’t be accepted 
I think this is nice.
How does this line
behave if you collapse the panel to min. size?
Feels like that minimal size is getting limited by it, I couldn’t pull more than that:
If line is shorter, then I’m able to pull it a bit more (and now it is limited by something else):
Difference is not very big in my opinion, and the first picture is one of the widest examples (big values plus exposure compensation).
I would be fine with that. I think there would always be some extreme combinations that were hard to serve: lower screen res., bigger font size, long line of data.
