You have the backward. It's an Admirals Club that is shared by BA. So the amenities are the same as other ACs. Unlike the PHL club that is a BA Terraces that the AC is sharing (temporarily)
Thanks for clarifying...sorry for any confusion. (I mistakenly thought that the arrangement would be the same as at PHL, where the amenities clearly are much superior to a standard domestic AC.)
Why is the PHL sharing situation only temporary? It seems like a great deal for AC members and probably saves AA some cash as well!