As others have said, they should have at least all the major deities in the game
Fair enough.
So, what deities should they add?
Cyric, Chauntea, Sune, Gruumsh and Silvanus?
Lathander definitely qualifies, especially in a game featuring Shar so very centrally.
Well, Lathander was one of the three deities available to the cleric in the original series. And he also returned after the fourth edition retcons. If Larian had not included him in the list of deities, I would have been surprised.