Yes, you are right. To some point it's similar to Django Admin.

It works already for navigation properties but not for many-to-many cases. I guess it's something we will add in future updates. could you please submit an issue about this?

Hm. What about it? These are two different tools for different purposes

Take a look at EasyQuery.JS: http://devtools.korzh.com/easyquery/javascript/

Live demo: http://demo.easyquerybuilder.com/asp-net-mvc/