Ashley often states that suggestions should be shown to be of use to most users and not just to the person making the suggestion.
It would help to give more examples of how it would be useful.
Would it be possible to have an event sheet that just has all your functions on it and include it wherever needed? That way all functions are readily accessible.
If you take Megatronx screenshot, what you would do is simply Shift+left click "Call "CastSpell...." and C2 would go to where you have defined that function, so you wouldn't have to track it yourself through your different event sheets. Its basically just a quick search for functions. Besides making navigating a project a lot easier, it would also help make troubleshooting easier, as you can very quickly follow a path through your project and check where things might go wrong.
And as stated its mostly for big projects, in my project for instant I have 27 event sheets with 3454 events, where most are functions, but think most people that are even working on semi big projects would benefit a lot from such feature.