i despise the term pis and will only invoke it as the uttermost last resort. that said, the whole xorn thing was.... pis. hard not to say that, really. but, the pf HAS had it's fair share of less than stellar performances. jean had the life drained from her by magneto on a seperate occasion while she was wielding the force. rachel has had a number of poor showings as well as some awesome ones. giraud, same thing. gladiator killed a phoenix as well, did he not?
i assume this thread is speaking of the force directly. even the force itself has had some issues--it was wounded badly in genesis and there was all that nonsense with ultraforce. it was also the force that xorn shattered. still, the pf's station is universal, and if you take into account the tower instance, we could say (gs WOULD say) its power is multiversal in scope. with it giraud healed eternity (but couldn't defeat dormammu).
all that said, i think at its height it is well above the odinforce. but if we take into account all showings, it isn't impossible to understand why some might doubt the force itself.