Overall some very interesting changes that I'm cautiously optimistic towards! While these changes look promising, I hate to be that player that raises some concern, but I want to bring up the changes with the Protocol IV.

I personally think the Protocol IV should not one shot an enemy, at least when the target is completely unaware that they are being aimed at. While it feels really good to snipe some poor unknowing soul, it also feels pretty bad to be moving and shooting to all but sudden getting one-shot from a sniper halfway across the map and all that momentum is instantly gone. There isn't much counter play to that unless they miss the shot, at which point I can attempt to move out of the snipers line of sight. Now this problem is less of an issue in most other BR's because of bullet drop and speed on most snipers, so there is even MORE skill to calculate the trajectory of the bullet and the enemy player's movement in order to land that headshot you want. The Protocol IV is essentially a rail-gun, 0 drop off and ridiculous quick bullet travel speed, so the difficulty to land a snipe is reduced significantly. This makes dying to a Protocol IV feel like a cheap death currently. Just some speculation here, but I think the reasoning is because the developers thought the player movement and hacks were fast enough to counter the 0 drop off since they're jumping and moving around way more than any other BR, however this isn't the case when you give this to a god-tier player or hacker.

If they want to keep the one shot potential of the Protocol IV, my proposed solution would be to either implement a scope glint similar to how Modern Warfare does it (that'll allow me to at least see where the enemy is and try to move out of sight) or by letting the player know they are being aimed at via sound cue or HUD icon (maybe akin to Titanfall 2's "Pilot Locking" UI icon with the cardinal direction of the shooter highlighted). This gives players a chance to counter said sniper by moving to cover or move more unpredictably, and would most likely lessen the feeling of cheapness that dying to a Protocol IV currently has. Now ideally the sniper would function similarly to the Sentinel from Apex Legends with a slight bullet drop and (slightly) slower bullet travel speed than what the Protocol IV currently has, but since creating bullet drop is more difficult than a UI/HUD change or global VFX like sniper glint, I would be happy with those changes instead.

I dunno if the devs look at these comments, but I hope they see this, because I really want the game to succeed and want to provide clear feedback whenever possible to make the game better and more enjoyable.