Overall, updating the Management IP address on your FlashArray has been a simple process. The tricky part has been the impact to the VASA Certificates until the release of Purity 5.3. In general, re-registering the storage providers after changing the IP address should if the FlashArray is not on Purity 5.3 should work. However, there have been cases where Pure Support was needed in order to manually reset the certificates for the end user. This KB will help both the end user and Pure Support when changing the management IP addresses on the FlashArray when vVols is being used on that FlashArray.
Web Guide: Managing the VASA Certificates with purecert via the CLI that covers managing the FlashArray's VASA certificates with purecert for more information.
One of the more overlooked aspects to using vVols with Everpure and the FlashArray is the VASA Certificates. That could be viewed as a good thing though. Since you aren't needing to spend much time managing the Certificates on the FlashArray then the automation behind the certificate creating and management is working correctly. However, a crucial component to the the VASA Certificate is the FlashArray Controller IP. This KB will cover what to do if the IP is changed and vVols is in use.