They've done a great job in getting real card art into the game this year. I've counted 70 Topps/Bowman cards that are new to Diamond Dynasty this year. I think that's already more new card art (minus Topps Now) than they did all of last year. It's nice not seeing an overflow of Signature Series cards.
I know this is such a minor thing when considering the myriad of things that need addressing in the game, but as someone who enjoys collecting cards IRL, this is a nice touch.