Hi there! I love mermaid tarot too and have that same edition as you. I edged mine in a light greenish aquamarine color and haven’t had issues with it bleeding onto my hands. I have an aversion to the backs so bought some aquamarine glittery spray paint to coat them with, although haven’t done it yet. I hate shuffling it too but worth it because I love the plastic card stock since it goes to the beach with me.
I have the New Chapter tarot from Liminal 11 which I love dearly but it is a pain to riffle shuffle. I guess the cardstock is very similar to the Modern Witch tarot!
I'm a terrible shuffler and only overhand shuffle, so I can't blame any of my decks 😂, but I do seem to have a tougher time with the rose petal finish because the cards tend to stick together. Also, I know many people like the cardstock of Pagan Otherworlds, but I found the cards so slippery when I owned that deck.