I'll start with the positives.

I like it very much that the Pig has several "actual" mechanics that we can utilize.

Getting CCed from the blue flames and after the jump feels very good, even that you see the oil on the ground and can anticipate that next flame attack will create a flame patch.

Gives a way better feeling of control than sangoon, where its 90% rng red circles you have to dodge and 1 CC phase where he is mostlikely outsiude the arena and you cant utilize anyway.

Now what sucks about the Pig.

When he is close to the edge of the arena it counts as if i leave his circle so i cant/shouldnt attack him there but all his moves constantly favor moving to the edge.

After many attacks Pig loses bodycollision??? Its been an issue from c1 btw.

Pig has too many dmg ticks. I have a spamable pve iframe (succ zerker) and i get hit really often through my irframe by several attacks. Most of the time its fine, even if they knock me down, but its understandably frustrating when you die due to that, lose your buffs for a mistake that isnt yours(?)

What i still didnt figure out yet, very rarely Pig just recovers HP althoguh im right in his face smacking that porkbelly, no idea what triggers this.

I agree with the previous speaker. I placed C8 Golden Pig and narrowly failed C9 several times. There were many reasons for this, from Golden Pig standing on the stairs and not being able to attack for a short time to the wall problem or simply random dead.
What bothers me most is that the attacks are already through but the animation has a kind of “delay”, so that after you have dodged you still get cc or massive dmg. You rather have to ifram once more, but not all classes have spammable ifram or are fast out of stamina.

The selfheal thing is annyoing to. I guess, it will trigger if you deal to less damage in certain time. Should be removed or reworked with mechanic.

The fact that the buffs are lost if you die makes the boss content in general absolutely annoying. No matter what level you do the bosses on. Just give everyone max buff when they go in or make the buffs not count when you go in.

With sorc awakening there is also the fact that when you change direction in the iframe, there seems to be a small gap and if you are on the attack, that's it. Give sorc the sythesetraining pve ifram back. Feels bad to work around with mainhand iframe.

And by the way, you can see again why there are already so many videos with mages clearing C10 Pig. Mage is just ungodly easy compare to other classes (pve iframe costs little stamina, self-heal and range attacks with frontguard).

One bug that i would add is that when pig goes onto the stone the circle seems to be elevated and therefore you are not in the circle anymore. 

With this fight is something serious wrong. Mayority of my attempts fail because of desync / dying in pve i-frame...