I'm not inordinately concerned, especially since it looks like there are a further three PHX>EWR flights in the day, and presumably, since it was booked as a single itinerary, AA would have to shoulder responsibility to re-booking me, right? I just have never had such a short window to connect before and have never been through PHX so don't know what it's like.

This is a TP run for my BA card so my only real concern is that I wind up downgraded and lose out on tier points.