Killcord is described as resilient and resistant. The resilience is undefined, and the resistance is defined as censorship resistance. I'll ignore the censorship resistance, as it doesn't seem to have any qualities different from any other Ethereum contract.

I don't see what this project is resilient against. In fact is seems unable to recover from issues such as the trusted third party publishing early.

How is key confidentiality preserved? The integrity of the keys? What if the keys are changed or deleted? How are DOSes protected against, so early disclosures don't get forced?

There are quite a few issues with the project. Unfortunately, killcord doesn't seem ready for release into prime-time as a key-management method. Killcord seems equivalent in intended operation to a non-blockchain HSM, but all the protections of an HSM, all the key management, all the security controls, they are all gone. This actually introduces security issues instead of solving for them.

What is the actual problem that killcord is attempting to solve? There are likely more robust designs, such as secret sharing, that will solve the target problem.