Improve Delimiters?

I submitted an entry in the Forum, and it was confirmed that what I want is not currently possible.

https://developer.ds.hcl-software.com/t/are-dynamic-field-sizes-supported/171572

To paraphrase... "No one ever said they like field delimiters. That is supported by the fact that one can uncheck “Show field delimiters” if you do not want brackets to appear at the beginning and end of a field. But that leaves no definition of the field location or size.

It would be nice if there a way to have those fields include a border, instead of the delimiters, and also accept and dynamically display as many characters as are entered by the User.

In the absence of a border, and instead of the delimiters, it would be nice if the field length could be set at a minimum, and the field area highlighted with a color... see the attached illustrtation.

Thx for your consideration.