Why do you think that finding an escrow here is a hassle?
There are many well reputed escrows on this forum and they charge really negligible fees.
Back to your suggestion, what will make people trust such bot? Will the process be 100% automated or it will require the intervention of a third party (bot owner)?
edit (just noticed your reply): So basically, your bot will make it easier to find an escrow and get in touch with him?
Most escrows can be completely automated (created, and released without disputes), and the manager only need to intervene in case of a dispute.
it's kinda similar to how localbitcoin and other p2p trading platforms work.