Thanks for commenting, we're glad to hear that you're liking what you see with Web Forms so far!
Can you please say a little bit more about what you mean here. Are you referring to text fields and their width? The ability to lay out questions in a grid?
It would be helpful to better understand what your end goals are. One of the design decisions we've made with ODK and one that is a strength for many projects is that form definitions can evolve as needed. That leads to a dynamic schema, possibly with nesting (repeats).
Some users build read-only replicas of their data in Central in various ways, including postgres functions. You need to be really careful to understand the limitations of those sync tools and how they apply to your context (e.g. do you make submission updates, do you use submission rejection, etc).
If you need a JSON representation, we recommend requesting that from Central: https://docs.getodk.org/central-api-odata-endpoints/#data-document