I've seen people with high iLvl running away from PS. The problem with PS is not the ilvl, the problem is that is a much "harder" dungeon when you could be easily farming WP or CT for Myths. Is a waste of time for those people. If you don't know the mechanics/don't understand them/you are a bad player, higher ilvl can help you brute force the way to the win, but is not a guarantee. And it happens that's the case with PS.
This is not a problem with the new dungeons since they are necessary to gain the new tomes. People will do them, learn them and realize that dying on a dungeon a few times until you know how to clear it is not that bad. Having a lower ilvl req means new people won't need to get Darklight gear/Myth gear to reach the new gear, which would mean those players couldn't catch up with old players, just because some peiple can't bother to learn the mechanics of a dungeon and they want to breeze it with overleveled gear.