You make it sound like it’s just editing a line or two of code, there’s much more to it than that.
As far as I know, there are no plans at all to release internal endpoints, or any new endpoint, through v5, meaning it would have to be worked into Helix. On top of that there is documentation, which is going to differ somewhat from other endpoints as a lot of the analytics provided by Twitch to the dashboard are less frequently update than other endpoints, so some understanding of how the analytics are updated would be needed or you’ll end up with some careless devs trying to poll the endpoints once a min for data that is updated daily, or even less frequently.
And on top of all that, there’s the privacy side of things. Analytics data based on end users being made available to 3rd parties can potentially complicate things if all the existing Twitch agreements already account for that.
A lot of my dev work is focused on private Twitch analytics, so I understand how valuable some of the data this API could contain can be, but with some smart thinking it’s possible to obtain the data yourself if you have the resources 