1.19a Patch Notes

[Molly_Millions]

Basically exp will begin to degrade if members are outside the optimum range (+/-5 levels?)

So now, as it was originally intended, a rank 50 in a party with anyone pretty much under 40 will cause no one to get exp. Meaning PLing must be done from outside the party now.

I'm not sure this is correct. Assuming they are going back to an exp formula similar to pre 1.19, PLing (in the same way) is still very possible, just at a slightly slower rate than post 1.19.