My suggestions for Pig
As far as I know, Pig is the only killer in the game who has their unique mechanic highlighted the entire round for something that's RNG that's not good. You don't see alarm clocks highlighted until you're asleep and you don't see purification pools iirc until you're infected. Why is the only stealth killer that can't inflict exposed giving away who she is and where to counter her the entire round?
Make Rule Set No. 2 baseline for Pig.
Second Suggestion, tweak her Ambush. The Roar is at the start of the charge, maybe have it start like halfway through charging it. Also, every exhaustion perk in the game straight up counters it which kinda blows as it's her main way of dealing with chases or getting a hit quickly from stealth. Feelsbad learning someone has sprint burst so they're basically invincible since they move faster than you do the second they hear the roar and will forever be out of reach. (Also Spine Chill is super common but that's another topic)
She doesn't need to have a faster ambush, just increase the duration/range like a tiny bit so if you actually get the drop on someone you're not cucked so hard.
I think that'd be fine. She still wouldn't be on the same level as Huntress, Nurse, Spirit, and Demigorgon, but she'd at least be on a fairly even field with the other m1 killers.