@DeMiGoD1988 For the nerfs:
P2020 doesn’t really need a nerf at all. It is generally a weak gun, maybe good as a sidearm with the semi-rare hop up. Others are definitely better.
Alternator probably doesn’t need a nerf either. The other light ammo guns are much better. It’s good in hip-fire, and decent at range, but that’s about it.
Mastiff: Not sure what you mean by incendiary rounds. Technically, it has them, but they don’t really do anything special like deal damage over time.
Generally, it seems like you want to nerf most guns in the game. If they are balanced afterwards, it’s fine. But it really would be a ton of work and very difficult to nerf most of the guns in the game and still have good balance.
Buffs:
Mozambique has not really replaced the EVA at all. It did get that ammo buff, but it still isn’t a great weapon overall, many people would even rather take the p2020 for the range.
Spitfire isn’t meant to be a super high damage gun, plus it’d be pretty unbalanced if it was.
The buffs aren’t nearly enough to offset the nerfs, so I assume you want to tone down the general ttk. If properly balanced, it could do that, but the question then is if they should. At least in S6, people were accustomed to the ttk, and so by decreasing it dramatically like in your suggestions, it would create controversy. Also, budget. Rebalancing every gun would be pretty costly and time consuming.