Executors are often secretive to the point of being furtive. Nothing is going to fuel speculation and suspicion on the part of beneficiaries more than being kept in the dark. An executor must respond to reasonable enquiries from the residuary beneficiaries of an estate. They are entitled to it, and responsible for policing the actions of the executor. They are entitled to see the Will and all of the documentation filed with the court. Believe me, if beneficiaries can't get the informaiton they're entitled to, they will suspect the worst. Perhaps executors don't realize that as soon as the frustrated beneficiary hangs up the phone, his or her next call is to a lawyer.
Time and time again I hear stories of family members who are presented with complicated, mysterious documents by an executor and being told to sign them, without being given any information about what's going on. Any executor who treats important legal issues this way should expect pushback from the beneficiaries. This is a textbook example of how to start an estate dispute.
The failure to communicate even reaches to co-executors. Sometimes a person will act for weeks or months as an executor and not reveal that there is a co-executor appointed until he or she is forced to do so because a financial institution refuses to go further without both signatures.