I'm sorry, but Pinhead colision shouldn't break survivors chains.

Close, but it's more like if clown had his own gas dissipate from walking through it.

They've recently nerfed Pinhead, he's overperforming in public matchmaking and therefore it's unfortunately unlikely we'll see buffs anytime soon. But from a "high MMR" perspective I'd agree that he deserves buffs. Maybe if they could identify what it is most players struggle with when facing him, there could be buffs to his chase strength compensated for with nerfs to those other aspects.

Here's a few things I think Pinhead should have:

Not breaking chains with his own body, as you say.

Chains that break in the environment should keep respawning until the survivor actually manually breaks them. Respawning chains are fairly easy to dodge, and manually breaking one chain at a time happens quickly. I don't see why they couldn't keep spawning until manually removed.

Alternatively, make it so chains don't break in the environment altogether, instead the breaking free speed on chains in contact with the environment is increased.

There should be a reward for hitting chains from afar. There's two aspects to this: hitting survivors at the max. gateway range (16m) barely gets you closer to them; hitting survivors at the max. range of the possessed chain (24m) does nothing despite being increasingly difficult. What this leads to is that good players almost never use gateways at long ranges, and almost always spawn the gateways as close to the survivor as possible so as to get an easy chain hit. But long-range uses of the power and trick shots with the chain projectiles are such cool parts of his kit that should be actively encouraged rather than discouraged. An idea could be this: for every meter of distance between Pinhead and the gateway and between the gateway and the chain hit, the chains take longer to manually break.

The exact numbers for this would have to be tinkered with, but here's a few thoughts on it: It's obviously much easier to get to full gateway range than it is full chain range, therefore gateway meters should reward less added manual break time. A full-range shot at 40m is so unlikely and difficult to get, it should guarantee a hit. 40m take Pinhead 8.7 seconds to traverse, so the survivor should be breaking chains for 9 seconds here, which is 3 seconds per chain or a 200% increase over the default breaking time of 1 second. Gateway meters could make for 1/3rd or 66.6% of these 200% - that's 4.16% per meter of gateway distance. Chain meters would then obviously make for the remaining 2/3rds or 133.3%, which is 5.5% per meter of chain distance.

At 16m max. gateway range, a survivor would spend 1.66s breaking each chain, so a total of 5 seconds. Pinhead can traverse those 16m in 3.47s. However, a survivor can still move while chained, so they would make some more distance in those 3.47s, plus they can break chains in the environment. I think these numbers could be alright, but yeah, one would have to see it in action and tinker with it, not least because I did not account for survivors still being able to move when coming up with the 200% increase for 40m.

I also think Engineer's Fang should be rebalanced with this in mind. That means rather than giving it any downsides like it currently has, simply make it so that the chain hit will only injure a survivor if it's at least a 16m shot, meaning you need at least a full gateway range, or a combination of gateway + chain range. Note that this doesn't mean the survivor has to be 16+m away from Pinhead, just that the distance between Pinhead and the gateway and the gateway and the chain hit have to combine for at least 16m. Or maybe to encourage trick shots even more one could make it so that the chain hit injures at any distance above 5m with this add-on.

But that's honestly bhvr lately. There was a point in time were they seemed to understand their own game and proceeded to make questionable decision after each other.

As much as I like the look of the realm reworks, many of them reintroduced problems they already fixed.

Don't worry. I'm the dev blog they'll state how it adds more skill to the killer despite being an unnecessary change.

Most people in BEHAVIOR should go and work on something else