It's really hard to find the selected track.
The screenshot is intentially wide. Please, display it at 100%, centered on the screen. You will find that looking all the way to the left in a search for a thin line is not the most effective workflow.
The track selection is a thing that should be made boldly. I'd say it is the most important thing in the TCP. More important than trackname, volume or solo for instance.
EDIT:
This is how I have it now. It is visible peripherially and does pass the squint test.