Hmmm,

not sure about mixing mint with other herbs like parsley and oregano...

Mint and parsley go well together: unsure about combining them with oregano.

I'm unsure about mixing them with the intestines. What are the intestines bringing to the flavor?

Well, the recipe doesn't mention cleaning the intestines before parboiling, so perhaps the intestines add a little zest.

the recipe doesn't mention cleaning the intestines before parboiling

and that's a deal breaker for me.