RE: My observation was meant to be a constructive criticism Steven.
Yes, that is how I was reading it. My sincerest apologies if I seemed to be negative in my response. It truly was not my intention. I was thinking aloud while attempting to understand the statement.
I understand what you mean. Yes, when I add a UI for my custom field API, I will very likely model it after contact form plugins. I was thinking more along the lines of how Advanced Custom Fields handles it since it is really popular with a lot of users already familiar to its workflow.