Check out "The MOAT MEOW Mashup Pack" here:
https://www.ephesusscroll.com/about/interest4.html. US$10 gives you access to 14 metas that don't always abide by the "rules" of the game. You won't quite know what to expect: asymmetry, 2-letter words, uncrossed letters, sometimes all of those, and sometimes none! One thing is for sure, these are some of the more creative metas my brain has been able to come up with. And there's more: this time there's a mega-meta!