I have a feeling that, if not this exact suggestion, then ones like it have been made before. Certainly there was feedback early on that some players found the dream sequences really creepy (and not in a good way!). Personally, I find they work for some of my characters whereas for others a different dynamic, such as the one suggested by the OP, would definitely be better. There is also the possibility that not everyone has “pleasant” dreams as iiirc the implication is that Astarion’s dream person appears as Cazador.
With any luck, Larian will have taken feedback on board and reworked the sequences or given us options. Personally I think the dreams are, or can be, pretty cool, and I like their echo of the dream sequences in the old BG games, so hope the devs can find a way to make them work for more people.
