An interview released onto OnePlus' official community website contains multiple tantalizing hints about the user interface on the upcoming 6T late-year flagship. This interview, given by the company's UX head and another software team representative, suggests novel camera and UI tweaks for the phone.
https://www.notebookcheck.net/OnePlus-6T-will-get-new-UI-and-more-according-to-company-software-reps.338088.0.html