Also, we’ve noticed a ton of questions about the schedule of our weapon tuning, so I sat down with several members of the Matchmaking Systems Team to get some insight into what tweaking sandbox settings requires (and what can go wrong):

The biggest difficulty in tuning the Halo 4 sandbox is that we support so many different modes (at a high level, we have Campaign, Spartan Ops, and Multiplayer). But each of those gets broken down even further: co-op (1-4 players), difficulty levels, Skulls, Forge, saved films, and a plethora of different multiplayer modes, some of which have different traits that further modify sandbox elements.

Why do Spartan Ops, Campaign matter? They're doing the weapon changes via Megalo. Megalo does not run in the Campaign/Spartan Ops engine. Furthermore, Campaign nor Spartan Ops support films anymore. There is no need to be concerned by knock-on effects of a Megalo script in modes that don't run Megalo nor have films. Theater mode automatically handles changes in Megalo script by embedding the gametype (including it's scripts) and the Forge variant inside the film file. This is why you can always recover a map as long as you have it's film, as the game will place the copy of the map in temp history once you watch the film.

As you can begin to see, we have to be very delicate with sandbox tuning not only due to how each change affects the entire sandbox, but also due to technical concerns. These include verifying that all animations, audio effects, and more function correctly as we tweak the firing rate, reload speed, and other values. As a result, our weeks of testing and tweaking will ensure that the final changes, when delivered on June 3, will provide the most optimal multiplayer experiences.

Aren't these all things that would have already been tested and certified in the title update that already included this Megalo functionality? If animations are broken or sound doesn't work, that's a TU level change. Megalo can't fix that.

They're really taking too long with this update, but I guess waiting and showing a bunch of people on a stream and promoting Geekwire is more important than stopping the massive flow of people leaving the game and coming back. They've lost almost half the population from when the TU that added the weapon tune functionality to now. They don't have the luxury of time they seem to feel they have.