I've started to read
https://www.logos.com/product/182642/in-stone-and-story-early-christianity-in-the-roman-world
and I was positively surprised about the picture quality: good colors, clear pictures.
I don't know whether the quality depends on the publisher or on Faithlife, but I expect that this progress in quality will continue.
How about updating the pictures and graphics in the earlier books? Would be quite a lot of work for FL without revenue?