There are 2 pp lounges in the E gate area (intl dep). The Prime Class is not for AA pax. I'm both an AA "elite" flyer and in PP. I used the new PC lounge on July 9: (1)not crowded (=sparsely occupied), (2)at 10 am breakfast items, (3)toilets in lounge, (4)both lounges have terraces--nice for plane watching*, a nice lounge.^
*ZRH airport (4 years ago) allowed pax (for a small fee) to use an observation deck--it was the terrace area for the 2 pp lounges; now they use a special area in B.