The deck is really a great thing to use in play. Fun, great, nice... but...
Even if the art of the cards is fine, it's totally not in the mood of the gam fr me. I would have prefered illustration which would look like the cards the gipsy are using.
The illusrations have a cartoon flavour that doesn't fit, for me.
But to bounce over the remark made by vecna: the halfling drawing a knockback over a dragon and dealing 5 damages could push the dragon away. I'd consider that the halfling simply hit the dragon's paw in a very sensitive place where skin is thiner, and that the dragon walked back a few feet under the pain... a reflex gesture like when you walk on a pin and that, even if not badly hurt, you step back undr the pain.
There are always ways to deal with the special effects. :)