I have several pages that are very similar: among other things there are some that sum up the status different sub-projects for larger "epics", and so on...
The copy-paste method is currently employed to duplicate the "/wiki/projectX/subproject/status" wiki page for each new subproject. This gets tedious (especially for non-techie users) and is prone to human error.
Expanding a variable like $MYVAR in the wiki source from the corresponding querystring parameter would potentially alleviate this by allowing one report page to be used for all the reports.
Example:
== Wikipage ==
[TracQuery(keyword=~$K)]
...(GET /mysite/wiki/StatusReport?K=MyTag) would resolve to:
== Wikipage ==
[TracQuery(keyword=~MyTag)]