In a traditional deck, the court cards have different "headgear"/crowns. It makes them easier to distinguish from each other. Yours are nearly the same, particularly the jacks and kings. Jacks have flat crowns, queens have "swoopy" crowns like you gave them, and kings have crowns with more points than the queens.
I like what you did with the edge - is that intended to be some kind of cribbage marker or something? It's an interesting idea. You can use it as a counter with a Meeple as a marker.
Good point (ha!) on the crowns. Maybe we'll see if we can do some tweaking on those, particularly the Jacks and Points for the kings. We probably wouldn't go with different crows for different suits due to the subject matter. When Meeples appear in games, they often come in identical shapes, but different colors for each player (so you would have all the Red Meeples, and I would have a matching set of Green ones for example).
The Marker around the outside of the card back is called a "victory point tracker" This motif appears on tons of board games. Similar to cribbage, it marks a players progress, when the game ends, the player who's marker is furthest along when the game ends wins. Here's some examples on game boards.
I really appreciate the feedback, super helpful.