The limitation on the amount of points you can attain is set on a weekly timer. Once it passes a week since you first began leveling a particular skill, the limitation resets to zero. After it resets, it will come into effect again once you begin work on that skill once more.
Even if you are hit with this limitation during a one-week period, its detrimental effects decrease if you do not level that particular class. You can even recover back to the full 100% rate of point acquisition, so you do not always have to wait the full week for the limitations to go away.
It's either an incremental thing (xp average/7 days) that occurs 1/day so you can recover a little bit at a time, and with the comment about leveling that PARTICULAR class, it sounds like another class can help with the surplus reduction (which didn't seem to quite work as planned in Beta 3).
So, if you surplus and log off, wait a week to 100%. If you hit 14% (1 day's worth), and wait a day, you might (depending on reset frequency) be fine tomorrow. If you level something else, you might get some bonus off the rest of them that are stuck in surplus mode.
I'm not 100% against this, as long as the 'average' isn't my buddy who wears all hand-me-downs at level 75 and is still fighting 10 xp mobs for giggles, and never showed up with a regen potion to a party. (yes, I know a guy like this, and if he wasn't a friend in RL...)