FWIW, virtual columns and tables are pretty easy in Django. AJAX-ify the forms seems to be possible but the packages tend to be pretty out of date.
Obviously you product has value for non Django teams, but tbh it's not clear to me this project is a win over django-admin for me (someone who reaches for that as my first tool to solve this problem). And some of the rough edges are not that big of an issue for me personally, not enough to add unknown risks w/ a new technology.
It does look great, however - hopefully this feedback is useful because I definitely don't mean to crap on your service.