That shared dialogue thing is a big one for me as well.
My top asks for Bg3.
1. DM Mode. The good news is the bones of it are in the software since DOS2 had GM mode which let you take control of any NPC and play as them, so in a fight you would control all the bad guys. You can spawn in enemies, create scenarios, items etc...
2. Shared dialogue as long as the party is grouped up. I realize it's a big ask but it's immersion breaking that you can't have your most charismatic person speak for the party regardless of who gets "tagged" in the conversations.
3. Day/Night cycle - I don't think this needs to be elaborate, something simple - no need to change people's locations or cycles even.
4. Hardcore rules. No bonus action shove without the feat, no barrelmancy, no help action restore without a heal kit, no throwing potions to heal or haste.
5. Character Export/Import - would love to export characters for other adventures with groups.
6. Smaller modules of 15-20 hours, or old D&D modules using this platform like Keep on the Borderlands, Temple of Elemental Evil, Descent into Avernus*, Curse of Strahd and so on.
*Descent into Avernus would make a lot of sense as a prequel to BG3 - or plot twist - Tav is one of the adventurers from Descent into Avernus and the tadpole insertion resets your level to 1.
The main thing is that this Engine and Platform is absolutely amazing and the long term viability of BG3 will be down to Multiplayer.
