IDK how I feel about Jewel. I think she's only, like, partially cannon? 'Cause she's in the comic now, sorta, long before Mimi and Jr. could get together.
I like Jr. and Mimi, but for all we know, they could be related. HIM did have a relationship with Mandy, once upon a time. We have no idea who Jr.'s father is (though I'm thinking Timmy Turner), and Mimi looks nothing like Blossom (except her eyes when she's in human form), so... IDK, man. Anything's possible.
If Griddles hadn't quit, and the writer dude who's name I can't remember hadn't died, I think Minnie would be like she was at the beginning, as opposed to the way she is now.