Big Ol' List of Killer Add-on Buffs
First things first, I have almost two thousand hours in this game and I play both Survivor and Killer. However, I tend to play Killer a little more often. Now that's out of the way, I can begin my discussion about the killer add-ons.
As some of you may know, certain add-ons for this game are extremely strong, while others are extremely weak. In this discussion, I will go certain add-ons for all killers, and explain whether they need a buff, nerf, or change in rarity.
Trapper
Serrated Jaws: Currently, this uncommon add-on applies the Hemorrhage effect when caught in a bear trap, which means the survivor bleeds much more frequently. This effect is laughable as you would likely already be caught by the killer before having a chance to hide. Not to mention, the problem isn't finding the survivors but instead catching them in a chase. What I suggest is to instead apply the Hindered effect, which reduces the Survivors' movement speed. This effect would not be removed until the Survivor is healed. This would help with chasing Survivors in the event they escape from the trap before you can grab them, and gives the Survivor a bigger incentive to heal quickly.
TL;DR: Remove the hemorrhage effect and replace it with the Hindered effect.
Wraith
"The Ghost" - Soot: Currently, this common add-on allows the Wraith to uncloak and have both his terror radius and red stain completely gone for a total of 6 seconds. While this in itself is decent, the Wraith still creates the loud "whoosh" effect when fully uncloaked, which exposes himself in the event that the Wraith is using the Coxcombed Clapper which removes the bell noise completely. What I suggest is adding the benefit of removing the "whoosh" sound effect to The Ghost - Soot, as it would allow Wraith to have an easier time when getting the ambush on Survivors.
TL;DR Add the benefit of removing the "whoosh" sound effect along with its current attributes.
"All Seeing" - Spirit: for an ultra-rare add-on, the benefit is pretty underwhelming. Currently, this ultra-rare allows the Wraith to see the repair progress of generators based on the intensity of their auras. While it does sound useful, it is too small of a benefit compared to other Killers' ultra-rare add-ons. What I suggest is adding an effect in which Survivors' auras are shown when within 12 meters of a generator. This would allow the Wraith to set his priorities on whether to continue chasing a Survivor or to disengage and protect the generator.
TL;DR Add an additional benefit of allowing the Wraith to see Survivors' auras when they are within 12 meters of a generator while invisible.
Hillbilly
Homemade Muffler: This uncommon add-on reduces the sound of the chainsaw by 35%. Due to Hillbilly having no ultra-rare add-ons, I believe that this add-on could use a massive buff. What I suggest is to have the Homemade Muffler's rarity be ultra-rare, and to have the add-on make the chainsaw completely silent. This would also work well with the Hillbilly's recently changed perk, Tinkerer, as it removes his terror radius for a while if a generator is close to completion.
TL;DR Change the add-on from being an uncommon add-on to an ultra-rare add-on, and have it make the chainsaw be completely silent instead.
Nurse
Torn Bookmark: Change from common to uncommon rarity
Dark Cincture: Change from uncommon to rare rarity
Fragile Wheeze: Change from rare to very rare rarity
Campbell's Last Breath: change from very rare to ultra rare rarity
All of the add-ons listed above provide the Nurse an additional blink. Since a third blink allows the Nurse to make a mistake, these add-ons should be more difficult to obtain as there is little counter-play for Survivors.
Pig
Amanda's Letter: This ultra rare add-on gives the Pig the ability to see Survivors' auras within 12 meters while crouching. Unfortunately, this also removes three Reverse Bear Traps from the Pig and removes 2 Jigsaw Boxes from the map. Even without the downsides, this add-on wouldn't be that strong. Since this add-on is based around the Pig's ambush attack, the add-on should provide an additional benefit toward's that ability. I suggest removing the two downsides the add-on has, while also adding the benefit of moving at normal walking speed while crouched.
TL;DR: Keep the benefit of seeing survivors within 12 meters, remove both downsides, add a buff to crouch speed to be the same as her walking speed.
Amanda's Secret: This very rare add-on provides minor benefits while giving a major drawback. The Pig can no longer see the auras of Jigsaw Boxes, and in return can see the aura of a Survivor removing a trap, and receives a notification once a trap is removed. I believe this add-on deserves a total rework. I want to see this be unique, so my suggestion is that upon successfully searching the incorrect Jigsaw Box, all other Jigsaw Box Auras are removed completely for as long as the trap is on the Survivor's head.
TL;DR: Complete rework, remove all Jigsaw Box Auras if the Survivor searches the wrong box.