Through the course of a 5 hour sprint on Christmas Eve I completed and deployed the new UI!
Although there was not a huge amount of difference between the final UI and the prototype I think the changes were important; the addition of small radial makers on the rotary disk to convey that it is spinnable and the addition of small glows to the "on" LEDs.
After a serious paper-prototyping session today I've decided how to implement the next feature: the ability to create and swap between multiple patterns (more on this as it is developed).
Merry Christmas and a Happy New Year guys!