Every greenfield project starts with a data model, but eventually gets encumbered in lots of crazy, bespoke business logic. This happens 6 months to 2 years into a project when some person asks for "one little thing". I'd love to see people who have used this for a while talk about data migrations, constraints, and all the other cruft that ends up happening in software development of CRUD.
This reminds me of Microsoft Sharepoint without all the widgets (which is what I meant when I said "visual") or Salesforce or even Microsoft Access. All of which are fairly difficult to manage, but appeal to a certain kind of customer.
The problem comes in when you have some complex business logic (you need 2 levels of approval on a Tuesday to publish this data)
I'd rather write all that stuff in a popular programming language.