And here's what's on the PeroPero page.
◆Information
We are currently revising the structure of the event and improving the situation with high level boss fights. All users will be equally compensated based on their event progress. We apologize for the inconvenience

That sounds like it's probably a good thing, hopefully the bosses HP actually scales bettter with the SED of the person who found it. I mean don't think that EVERY player should be able to handle EVERY encounter by themselves otherwise it really defeats the purpose of summoning friends or perhaps buying pudding if they want all the EP for themselves. But eventually everyone gets to the point where they're summoning the very hard to kill 8.7M girl and are forced to rely on higher SED friends. Hell even the weaker girl that I posted was way too much for the person who summoned it to handle without using MUCH pudding.
-EDIT-
Actually that guy in that thumbnail could have handled it BUT some people are getting ridiculously out-classed by the Kasumi's they're finding!