I consider work done to make hivesigner better a good thing... it's been a long long time since it got good UX love. New functionality sounds cool but to be honest I watched the video and it sounds like it was mainly for developers to understand I'll see if someone has some interpretation for me. I'll ask @asgarth perhaps

But in general I'm glad to see work being done on HiveSigner because it's tested as the most confusing experience but as the OLDEST system and most used mobile experience it is still very important thing for Hive.