Yes please. I really like the idea of having an illithid ally, I'd love to see them expand on him. As things stand, his character has too many holes and inconsistencies. The game gives you the option to interact with the prism by right clicking and using it, but it doesn't do anything. It makes sense in the beginning when we don't know what the prism is. Once we figure out the dream visitor/emperor is within the prism, we should be able to interact with it in a companion-lite kind of way. Use it as a means to interact with him and explore more of his character through dialogue options.
There are a lot of great reddit threads with feedback and insights regarding his character that I just want to add to here. He's definitely a very controversial topic if these threads are anything to go by. I think it's because of how dramatically his character sways depending on the dialogue options you choose. People who react suspicious and rude to him see him as this big evil character with no redeeming qualities whatsoever, where as those who are trusting see him as a good guy who's had to make some questionable decisions to survive. I mentioned it before, but it's like the game can't decide what he wants to be. His personality can do a complete 180 depending on your dialogue choices. His actions and personality aren't consistent, and people either really hate or like him depending on what side of him they see.
https://www.reddit.com/r/BaldursGate3/comments/15s8tln/kinda_frustrated_with_emperors_dialogue/https://www.reddit.com/r/BaldursGat...or_his_identity_and_choices_end_of_game/https://www.reddit.com/r/BaldursGate3/comments/16192oc/about_morality_and_the_emperor/