I guess UA has decided that F pax don't matter to them. I was in ORD yesterday and watched a CDG flight board. What a total ClusterF. I'd be totally pissed if I was a Business class customer at the end of a long Group 1 line behind Gold members, Plat members etc just cuz I spent more time in the Lounge and wasn't first in line.
Separate issue would be boarding thru 1 door on a full wide body just adds even more craziness.