In usability testing it was found to be more confusing than helpful. It seems to fall into the general trap of adding validation. There is no way to write a message general enough to cover all situations and avoid being incorrect, and be specific enough to be helpful to users as they trouble shoot. Most helpful is adding specific parameter descriptions to TemplateData which can describe exactly what that template is expecting.
- Remove the message which displays when custom inputs are typed into the combobox