In the transition from Viptela to Cisco SD-WAN, there have been very huge revision cycles in the last three to four years. This does not happen for a stable product. Still, it is because Cisco has been migrating from one vendor and merging into their own operating system and making a lot of additional development beyond what is required. This has made it tough for enterprise-level integrators cannot find downtime to keep up with the upgrades. Cisco is working to stabilize the product, which will likely be much more stable in the coming years. So, I would like to see revision cycles to be more stable. Another area of improvement is the licensing and pricing model. The Cisco SD-WAN licensing model needs to be simplified. There are currently three types of licenses: enterprise agreements, individual licenses, and DNA subscriptions. This can confuse customers, requiring a dedicated person to determine which type of license is right for their organization. Although Cisco is working on many features, the general usability of the templating mechanism should be improved to make it easier to use and understand. The various GUI elements are different, as in Cisco Vault. If I migrate from a CLI to a GUI model for managing devices, the GUI is still more like Viptela. The GUI should be more aligned with the Cisco CLI regarding terms and concepts. The tools need to be more intuitive to use.
