Strange, l i always thought of PP as being a feature that required both PvP and PvE to succeed. I can't imagine a power getting top spot through PvP only. At least, not without radical changes as to how PP works.
It would be interesting to see if that is possible after the changes. Except,l just like now, there will be a variety of players playing PP,l including those who just do the PvE (i presume). To be hoenst,l it might be interesting joining the power where the most agressive PPers sign up with, and see if they can resist shooting me, or whether they really are interested in PP as a mechanic or PP as a principle.