The only decks I have where the suits have been changed are the
Tarot of Baseball and the Halloween Tarot. While not full on spoof decks, I would almost classify them as parodies. They're definitely novelty decks. I rather like them.
That having been said, no, if someone's trying to do a traditional Tarot without their tongue firmly planted in their cheek they should stick to the traditional meanings and suits. Tarot's been around for about 500 years and used for divination/fortunetelling for about half that. If it ain't broke, don't fix it.
Pretty much the only change in suits with the majority of my decks (like all but the aforementioned ones and maybe one or two more) is changing Pentacles to Coins/Deniers. That's just a different name for the same thing. Coins flows more easily off the tongue when doing a reading, too.
I don't see people trying to get so creative with playing card suits. I think card players would be in an uproar. With playing cards, it's usually all about the backs. Even my plastic Space Invaders deck(!) has the traditional red and black cards and suits, though the images are a bit different, obviously. My blue Dragon deck by Bicycle has the red suits printed in blue ink. This is a refreshing change and I wish they'd do it more often.
Still, though...that Steampunk deck with butterflies and beetles? No. *sigh*