English Wikipedia editor notes that sometimes when parent templates are removed, a subtemplate (or two) should remain, such as with Template:Multiple issues (http://en.wikipedia.org/wiki/Template:Multiple_issues). It would be a nice feature to allow the parent cat to be removed without removing all parameter, or permitting them to be "escalated" into templates themselves.
Realizing this is not likely to be a high priority, given more urgent issues, just putting in the request. :)
Version: unspecified
Severity: enhancement