My man - one shot melee weapons have been a thing ever since Halo 1. Shall we list them in order?
Halo CE - Plasma Pistol, M6 Magnum, mid range shotgun, sniper rifle.
Halo Reach - Sniper Rifle, plasma pistol, concussion rifle, DMR, Needle Rifle, Magnum, midrange shotgun.
Halo 2 - The old glory of the BXR combo (Battle rifle), Magnum (weakest in the series), midrange shotgun (almost mandatory with its nerf), sniper rifle/Beam rifle, Carbine, Brute Shot.
Halo 3 - Plasma Pistol, Magnum, Battle rifle, Carbine, Sniper rifle/Beam Rifle, mid range shotgun, -
MAULER (seriously, anyone talking about nerfing the Mangler - did you all seriously forget this thing exists? Didn’t require the accuracy of the Mangler, even faster melee animation, more consistent lunge? Seriously?) -
Brute Shot.
Halo 4 - Boltshot. Sniper rifle/beam rifle, plasma pistol. Battle Rifle, Carbine, Light Rifle.
Halo 5 - Plasma pistol, sniper rifle, beam rifle, battle rifle, carbine, light rifle.
Yes, a lot of these required headshots. But only about half listed. And while there’s an argument to be made for the idea that the Mangler should require a headshot that kills the idea of being able to fire one shot to soften a target on the approach and then finish with the melee - not to mention making “the rich richer” as that skill gap keeps the top tier players right where they’ve always been, only hurting the average population. And here’s the thing - nerfing it just shoves the plasma pistol into that role, and then everyone complaining about the Mangler being able to do that will then complain about the PLASMA PISTOL, of all things, being able to. Even the Hydra is capable of this combination and it’s not exactly a power weapon in the current sandbox as much as it is a specialist anti-vehicle tool, requiring the same three to four shots to kill another player. And no one is complaining about that gun.
I get the sentiment but… no. Such combinations have been a thing in Halo since day one. Don’t try and claim they weren’t.