More subraces for tieflings, this time related to Demon Lords and Abyss (Demogorgon Tiefling, Graz'zt Tiefling, Orcus Tiefling e.t.c).
The team increased from four to six members.
One or two new classes.
A new race (I dream about cambions, it would be great to play a literally half-demon or half-devil).
The possibility of choosing a patron for ALL classes and a really abundant choice of deities (Lathander and other Faerûn gods, but also the gods of the Egyptian, Nordic, as well as the Demon Lords and Archdevils.