Wyll lacks content because he was completely changed in EA because people didn't like him (although I suspect it was because Larian scrapped the additional origins they planned, noticed that they have not enough good companions and decided to rebuild Wyll) and Larian gave him the bare minimum of content.
Larian also made it clear that they are done with BG3 and photo mode and additional kisses was obviously more important than story improvements or adding missing things like dragonborn guardians or letting you design mercenaries instead of relying in fixed characters.
