These are some questions and issues that we could make us when we are building/using a form type or type extension:

• Why is not my extension being applied to the form type?
• Why is not available my new option in the child type?
• What are the defined options for my form?
• What options are required?
• I want to modify the default value of an option but I don't know if this value is allowed, where was this option defined to know that?
• etc.

Generally, I use the documentation to know what options are available, required, etc. I guess that keeping this options list updated is quite cumbersome and still there are options missing, e.g those defined by type extensions.

What about add a new command debug:form to get information from form types?

Can this help us?