I rather like the pips on the ten of spades.
If for no other reason than this, if it's good enough to be included in a royal flush, it ought to stand out a little bit. It gives the ten a little bit of a head nod.
I also like the pole with the little knobs as Don mentioned.
As far as printing in two metallic inks, to be honest, I think that would be pretty bold in a lot of decks, but I think with these it would look terrific. Some of the armor bits and the mace on the clubs and spades and the gold on the diamonds and hearts.
I personally loved the old artwork as well, but the new ones really made me say "wow" out loud. From the time you first posted until now (I spent a while reading this whole entry) it's come a long way. What you started with was good, these look great and getting better thanks to all of the great advice.