OSMC skin - watched/unwatched TV shows

The OSMC skin has the approval of my wife with just one complaint - the watched marks (tiny white dots) are not very obvious.

They are too small, and sometimes when you bring the thumbnail of a TV episode into focus, the watched mark will vanish entirely!

I think this is limitation of the OSMC skin rather than a bug in my installation, as I can toggle between watched unwatched to see the result.

And if switch to List View, there are no ‘watched’ marks at all!

Are the watched marks still in development, or can I suggest some improvements?
I had a quick look and the Skin development intro & manual, hoping I cold tweak it myself. Didn’t get very far!