I think TMP originally came up with the idea now that i think about it, they used "escrow agents" that took over the buyers side of things, all the buyer had to do was pick from a list of escrow agents when he bought a listing and send btc to the payment address.
The escrow agents would handle all the extra multisig steps and if there was a dispute or the market went down they would handle it with the market/vendor, so like in the case where the market runs and the vendor is wanting his money then they would have the arbiters email address or reddit contact they could finalize it instead of the current multisig setup where the buyer is supposed to find the vendor somehow and run through a ton of complicated steps.
This will probably hit page 10 in a few minutes since the market operators are going to do whatever they want anyways but if people want multisig to work they will have to make a stink of it when they are given the bastardized multisig these sites usually try to pull over our heads.
Thoughts?
Wait, what's stopping these agents from stealing funds?