As all supported scripting languages (except VBScript) support optional function parameters that can be set within the function body, I think that it is a good idea to make the 'Run Current Routine' Code Editor's context menu command to be enabled for both procedures and functions for all scripting languages except VBScript (where it should be left disabled for functions as it is now).
Welcome to the TestComplete Feature Requests board!
Here you can review submitted feature requests and vote up the ones you like! If you can't find the feature you want - go ahead and suggest your own idea. Ideas with the highest rating can be implemented in the product.