ELI5: Do exp penalty’s get transferred to the group?

[cd288]

As Videri said, in essence it's kind of like the EXP penalty gets apportioned out among each member of the group, which is why some groups don't want hybrids (but ironically don't seem to care about having multiple Monks, which would be the equivalent of having 1 Pally/Bard/Ranger, or 2 non-SK Ogres/Trolls).