Change it to tokens as follow:
Then move the url builder to the Piwik instance instead of Piwik.org and allow for keyword types and keywords to be stored agaist the token.
Keyword: Keyword type = Keyword
Keyword 1: Medium = Banner
Keyword 2: Location = Facebook
Keyword 3: Campaign name = SummerDeals
One can then later report on which medium created the most traffic. Which location did not produce any result. Etc…