Yes the curtain are gone, they 1st class is at the London end (at least for now)
Is the disabled area in coach 2 (if you take coach 1 at the London end with the first class) - Not sure if they will try and keep the disabled area in the place.
So we have for trains heading to London.
379
Coach 1 (first & Standard), Coach 2 (accessible standard), Coach 3 (Standard), Coach 4(Standard)
387
Coach 1 (standard), Coach 2 (accessible standard), Coach 3 (standard), Coach 4 (First and Standard)
Hard to tell if they will do anything with the seating, the 321s were never touched, however GTR Have put ironing boards in some of the 377s. I would also be amazed if 1st isn’t reduced, but they never did on the 321s