Hi,

I have not read the whole thread in the links but if it is a 2of2 MultiSig then it is the initial concept i tried out which turned out that it is unsafe regarding blackmail.
as the deposit is async the party with less money locked can blackmial the other in sending a pre-signed blackmial payout tx. that way its rational to accept the blackmail.
If the concept you mentioned is differnt to that what I assumed, can you describe it quickly? I don't have much time yet for reading too much...