My team and I are developing an map-based website for a client, which merges a lot of geographical information onto the map. The project itself is so innovative (not meant to sound snobbish here), that there is nothing to compare it with and no standards we could orient towards. Imagine Google Maps extended with additional information about the energy infrastructure of a region. Moreover, even the client has no precise vision of the user and tends to change the applications requirements from time to time.
Since there is no clear user or use case, I am stuck at creating random proto-personas or conducting usability tests with my colleagues, but with every requirement shift they seem to be reduced to absurdity. My question is: Can I really call myself a UX-Designer relating to this project or do I have to reconcile myself with the reality that I'm just have to implement the clients' wishes and focus my ux work on other projects?