...I have yet to locate someone in the US who has successfully completed a UKM citizenship after the biometrics started to be required....
I applied via UKM in September 2016 and was approved in early January 2017. I did my biometrics at a USCIS office near my home in Arizona.
Here's a timeline of my process.
Shipped materials to Liverpool (USPS priority express): 19 Sept 2016
Delivery made to Liverpool: 26 Sept 2016
Acknowledgment of receipt (email): 3 Oct 2016
UK requests my choice of location for biometrics: 8 Oct 2016
UK notifies me of appointment at USCIS: 12 Oct 2016
Biometrics given: 18 Oct 2016
Approval letter sent: 9 Jan 2017
Approval letter received: 24 Jan 2017
I'm now waiting to hear from the British Consulate General in Los Angeles to fix a ceremony time.
I hope this encourages you. Good luck!