From looking at the HP SDN user interface page (https://<ip_addr:8443/sdn/ui), is not clear as to where one would actually go to in order to perform configurations.
The HP SDN user interface page looks more like a management tool than anything else.
As far as the UI is concerned, yes, it is limited at this time as we assumed majority of the configurations would be done via REST API. Future versions of the HP SDN Controller will extend the REST API and provide additional UI screens to allow adding, removing, re-viewing flows, viewing topology, finding shortest paths, etc. In HP SDN Controller 2.0 we have GUI screens to view topology, finding shortest paths and viewing flows.