eg we have on event

Piwik::postEvent('API.Request.dispatch', array(&$finalParameters, $pluginName, $methodName));

and another event

Piwik::postEvent('API.Request.dispatch.end', $endHookParams).

I'd expect to have similar parameters in API.Request.dispatch.end ($pluginName, $methodName as parameter).

Also the naming is inconsistent. Sometimes we say $pluginName and $methodName, in ....end event it's named module and action.

Same applies for API.%s.%s* events.

The events in FrontController are even more inconsistent. Eg we have

Piwik::postEvent(sprintf('Controller.%s.%s.end', $module, $action), array(&$result, $parameters));
and Piwik::postEvent('Request.dispatch.end', array(&$result, $module, $action, $parameters));

Both .end events should post same parameters. In general instead of module we could also use plugin maybe but not sure. plugin might be more clear for 3rd party developers what is meant

This is something for 3.0 or 4.0