"We called"? Did you call and actually speak to some person at the insurance company? If not, who exactly called? I can't conceive of anyone at an insurance company divulging this sort of information to you (a non-relative not named on the policy). What position did the person at the insurance company hold? You wrote that this person "confirmed the name." Have you actually seen the policy or the beneficiary designation? Did the person at the insurance company identify the beneficiary as "John Smith," or did the person specifically say, "John Smith, as Executor of the Estate of Mary Smith"? These are super important distinctions, so it's important that the information you provide be as precise as possible.
I also don't want to know the name, but that's a horrifying breach of privacy (yeah, "horrifying" is a bit of an overstatement).
Anyway, unless you want to answer my questions above, I think we've pressed this as far as possible here. If the court-appointed executor isn't doing his job properly (and keep in mind that not immediately distributing money and not providing monthly phone updates is not improper), then a lawyer should be consulted about possibly seeking removal of the executor.