There are various posts on Answers about the shortcomings of the built-in Address field in Forms, this includes within the New Designer. I think the new Field Rule abilities in the new designer would be able to resolve a lot of the issues.
If the new field rules could be used to control the various parts of the built-in Address field, that would be amazing. The way I imagine it working is when you go to select the field in the rule, you would see multiple options displayed as:
- {Field Label}: Street Address
- {Field Label}: Address Line 2
- {Field Label}: City
- {Field Label}: State/Province/Region
- {Field Label}: Postal/Zip Code
- {Field Label}: Country
This would allow a user to target a specific part of the Address field in question and be able to say whether or not to show, hide, enable, disable, or validate any part of the field.
Another improvement that would be very helpful for the Address field is to be able to use it with database lookups. Again, using the idea above for targeting specific parts of the field would be very useful.