A question about velious hybrid xp penalties...

[Crackspyder]

Will anything actually happen when these penalties are removed?

The way these penalties were explained to me, was that for hybrids, the penalties didn't decrease xp gained per kill, but increased the xp threshold for each level. If that's true... will the thresholds for each level just be lowered? Would it be possible to gain levels based on xp already gained, if your total xp is greater then the new level thresholds?