Yeah I think it's the rock after the short climb, right line is smoother but off camber, mid and left lines less of camber but undulate more.
Looks like some of the undulations in the middle were filled in.
I wonder if there were "official" looking signs around regarding the trail work?
It's almost like someone was just confused and assumed the modification was unsanctioned and ripped it out?
That move and the other one shortly after it (rock with some exposure to the right, directly before the wood roll down) are the only things not blue about the trail, it probably makes sense to clean them up a little and return the trail to a blue rating. If the trail fundamentally made more sense as a black I'd say they don't need anything, but to make it a blue it makes sense.
That said I think people only access FA from black rated trails, so maybe it doesn't really matter if it's blue...