Looking for a more robust alternative to houston:admin

Houston is pretty great, but I’m finding it a bit lacking. As one example, you can’t add extra records nor can you add to an array.

I suppose as a last resort I can build my own simple CRUD interface, but I feel like I’d be re-inventing the wheel. Any suggestions?

Maybe https://atmospherejs.com/aldeed/autoform? It gives you the C and U.