Deathslinger will never be "fixed"
Since PH is getting M2 release CD, many people were speculating & asking if slinger will be the next to get changes to make him, give survivors more chances to outplay his power or limit it on other ways.
The thing is, only realistic changes to slinger are the ones to his TR or to his M2 spam which aren't adressing people's main complains that his shots "can't be countered" with reacting to them.
And why do I think that devs won't ever change slinger's instaADS ? Well, it's because of a few reasons:
1. Fixing instaADS isn't changing survivor's ability to react to them (since the shot isn't reactable due to the projectile speed, not the ADS speed) but mainly telling them when they're supposed to start making tricky movement yet they still can't react dodge the perfect shot once they're in it's reach.
2. If the instaADS was made longer, slinger would lose his main reason to exist. The main thing that makes slinger good and allows him compete with huntress's power is his instaADS giving him very high consistency in opportunities for shots, justifying his existence. If he had longer ADS, he would become redundant beiing overshadowed by huntress in every important aspect of killer gameplay.
3. "He just needs a full rework" Actually he doesn't. There were only 2 major reworks to killers who broke the game - Freddy and Legion. Both hardcountered certain surivor playstyles, Freddy stealth, Legion chase.
Slinger is a killer that is extremely good duelist, chances to loop amazing slinger are extremely slim but that's not good enough reason to rework him. He's not breaking the game since chases against him can be won, either through slinger making mistakes or survivor playing well be it playing extremely safe, beiing lucky at predictions, making good decisions (when to abandon unsafe loops, when to abuse safe loops, knowledge of slingers trick shots) etc.
Slinger has limits and requires a lot of skill to be played "perfectly" while also having many other weaknesses to balance out his strong chase power. He's a killer that was designed with the idea of beiing dominant at one aspect of gameplay if played well while beiing weaker in others. He isn't breaking the game even at chase so I truly don't think that reworking him would be justified.
These are ofc just my opinons as deathslinger main on controversy surrounding him. I might be wrong and devs might eventually increase his ADS or give him a rework but I personally don't think either is warranted.