I've noticed that some HUD stats can have an infinity symbol for their value - so, why not for the PA stat?
Currently it uses 0.0 for players who have yet to play a hand from EP. But, that's a little misleading, because a low PA stat normally means that they have less positional awareness. 0.0 implies that they only play hands from EP and never from LP.
If they haven't played a hand yet from EP, then the PA value should be their % of hands played from LP divided by zero, resulting in infinity.