So they indicate that they are aware of the problem - and instead of doing a straight-forward "hey, I'm a bot", their suggested strategies are "being clear about the intent of the call" and "experiment with the right approach over the coming months"?

To me that quote sounds more like a polite way of saying they definitely won't reveal to callers that they are talking with a bot than them taking the concern seriously.

Some of the conversation examples on the blog page where they invent a sort of story for the caller ("I'm calling for a client") would fit that theory.