Where I've been stuck on Wordsy is the advantage one player is likely to have being more straight on and properly oriented to the letters. The gameplay itself is appealing, but when I visualize trying to speed spell with upside down letters, suddenly it feels more frustrating than appealing.
Don't think I've seen any photos or video approximating real life play, where each player is at a different orientation to the letters.
I'm a little surprised they haven't tried an add-on player mat, selling it via the advantage of being able to quickly turn the "board".
It's an advantage I've looked for in testing, but I've never seen the upside-down players be disadvantaged. I think it's because this isn't a twitch game. Pure speed isn't as important as a good real-world vocabulary here.
That said, I'm curious if players will prefer cards with small upside-down versions of the letters on the cards. I have a poll here asking that very question.