Not counting Wyll and Gale (at least the Gale is explained) no other character is overly exaggerated.
-> We know practically nothing about Shadowheart. Before kidnapping, she might as well have been a peasant or an avatar of god (in terms of power)
-> Lae'zel looks like a standard young fighter trying to prove his skills. She even mentions that she was never on the astral plane and hopes to become her home soon.
-> Before the kidnapping, Astarion probably never fought (or at least didn't have much of a chance). He may have been a slave, but his master was mighty.
