If I may put in a comment late: Maybe more heraldry based emblems? (Lions, Dragons, Stags, eagles, double-headed eagles, etc.) instead of just mundane, personal, or especially meme symbols.
The absolute best case scenario would be making a completely custom symbol with backgrounds (pales, fess, crosses, ermines, etc. ) and symbols in conjuncture.
I personally wish symbols still had color too (if you fall for spies, your the one at fault for not paying attention on the field of battle, and for playing with team colors on).
Not a bad suggestion, we'll see what we can add.. As for spies, they were just getting out of hand unfortunately. Had to do it.