My attention was brought back to GC with Jimm's beta for FFDL, and so far covers are looking pretty neat! Especially right aligning the author with the one line setting.
Anyways a thought that I had a while back when fiddling with the plugin is: could it be possible to add a special color setting for the fonts for inverting their colors and/or making them translucent over a stretched background? I wind up getting a multitude of different covers when I download fanfics and the fill color (even with stroke applied) doesn't always make the font stand out.
And since another idea just popped in my head, an option to allow cover dimensions based on the background image?
Awesome work to you, Jimm, and the rest of the devs! Calibre and its plugins have made my reading life so much easier!
