Currently, if you use TemplateData for a template without any parameters, you still have to create an empty "params" in the JSON (not really important), but you also end up with a "Template parameters" table with just the title line (Parameter Description Type Default Status).
Rather than displaying an empty table, I think it would be better to display no table at all, or a simple message saying that no parameters are defined for this template.
Version: unspecified
Severity: minor