I think the main purpose of this Marc arc is to show that Sasaki is masterful in his planning and negotiation skills, on a grander scale and with higher stakes. Not quite sure about the higher stakes tho, since even though Marc’s life is on the line, we weren’t really given much to care about him. I barely even noticed the character before his arc. But yeah. I‌ think it’s a wasted opportunity. It could have given us a much better feel of Sasaki’s interpersonal skills, but ehhhhhh, this is what we’ve got.