I've long believed (and posted) that the 787-8 will be regarded as the 767-200ER of the 767 family. Simply too small. Good to see UA minimize the 787-8 fleet (now capped at 12) and go with -9s and -10s.
http://www.flightglobal.com/news/articles/united-converts-majority-of-787-8-orders-to-10-variant-402363/
http://www.flightglobal.com/news/articles/united-converts-majority-of-787-8-orders-to-10-variant-402363/