It does look very good as a slightly more modern design with lots of nods to the original. But in my very humble opinion it doesn't set it apart enough from other designs I've seen. Is it possible to distill it even more so that it shows more of rjtomlinson in it?
If I may ask: what would your courts look like if you'd never seen a court card before? Of course, that would be rather hard, but I hope you understand what I mean.
If you did that jack just from your own head, and then added a few nods to history, would it look any different?
EDIT: I went back and reread the thread, and I think I understand what you mean. You want them to be very clearly recognizable as standard playing cards courts, yet with a modern touch? In that case you can't change all too much, but you have to keep them conforming to the standard. You've done great with these.
How important is it to you to stick to the standard design? For example, Jackson Robinsons standard courts deviate rather much from standard, yet they are clearly recognizable?