Look a bit through the card list and you'll notice very soon cards that have really awesome card art such as Estoma, but never see play.
I mean this game's appeal also comes a lot from the card art, which means that card art like Gardia's would greatly improve the environment if it was played more often, as opposed to not at all.
I am not trying to say that fugly cards like folfernac are justified to be bad, but great art needs to be encourage to put on display more often. When was the last time people seen Bounty Hunter / Elena? Some don't know it even exists!
There are players that have been here for a while and sometimes when i randomly mention a card such as noirweden / bander, they're like "huh? wtf is that?"
You might disagree that Roar of Courage / Brave has great art, but when players need 5-7 guesses to find out who that is, you notice there's something wrong!
Variety creates appeal and decreases the time it takes for one to get accustomed and eventually bored.
Think about it.