I don't think you do either, frankly. Armors are one thing, weapons something entirely different.
It is one thing having the model hold an SMG or a Magnum and another holding a beam rifle or spnkr.
Only in the scenario where the model is holding it with two hands. If its holding it with one then there would be no difference. As for the latter scenario, it should be noted that they are going to have Animations of a Spartan holding every weapon in the game. That is a requirement for the gameplay. Animations are reused all the time in video games. While Large weapons are held differently, you seem to forget that the vast majority of the weapons in Halo 5 are held practically the same. AR, BR, DMR, Shotgun, Saw, Hydra, Railgun, Grenade Launcher, Carbine, Storm Rifle, Plasma Caster, Suppressor, Light Rifle, and Scatter Shot are all held practically the same, baring slight differences in finger placement, and are all relatively the same size.
Funny side note, the Rocket Launcher and SMG are held very similarly in Halo 5.
Quote:But that's not all you have to worry about, since the model in most cases isn't standing still. In most cutscenes the model is active, not passive.
It walks, runs, jumps, takes cover and you have to balance the slightest move for every kind of weapon available.
A model walks the same way in every kind of Mjolnir Armor, weapons are a different topic.
It doesn't move it limbs, neither arms nor legs, the same way while holding a heavy weapon compared
to holding a light weapon, but every single move has to be accounted for.
I hope I could enlighten you.
The Animation of a Spartans Walking, running, jumping, or crouching have always been the same regardless of the weapon they are holding. There is no reason to believe this would be any different in cut scenes.
The only time they would have to make new animations to accommodate different Weapons is when both the character model and the weapon model are interacting with the environment. Something that doesn't happen all that often in Halo Cut scenes.
Mind you, I'm not saying that making cut scene with every weapon is as easy as making them with one. I just think you and a lot of people over estimate the difficulty.
Motion capture also makes this much easier.