"They also need to get the lore right, like Sonizorus said. The trailer released is really wrong. That's not the correct way Illithid transformations work, so they either need to fix that (disregard their video) or come up with an in story reason why the transformations are not normal and work like they do."
You assume they do not already have a reason for this just because you don't know. In the first 2minutes of the game there is already an encounter that clearly shows there is something behind this.
They know the lore, people
