I wouldn't be the first person to mention the strength of security on z/OS as one of its inherent advantages. RACF is powerful, detailed, and flexible. But, to be honest, I'm not sure I would use the term "ease of use" when talking about RACF. That's where tools like IBM Tivoli zSecure come into play.
On April 22nd, at 11 AM ET, there will be a free webcast on "Cost-effective mainframe security compliance with zSecure suite v1.11". The webcast will cover how you can reduce costs with simplified mainframe and RACF security administration, reduce exposures with automated security policy controls that enforce privileged user monitoring and other best practices, and manage risks with closed loop monitoring and remediation to reduce security threats. The speakers are Jamie Pease, IT Specialist, System z Security, and Glinda Cummings, Worldwide Tivoli Senior Product Manager .
If you are interested in simplifying z/OS security management in your shop, this might be a topic of interest. And the price of the webcast is right, it's free. Here's a link to sign up for the webcast: