I think the dream is the way Lucas interpreted each girl and what he saw them as in the future. Brooke is a successful and independent woman who clearly cares about her career, friends and family.. that was portrayed in the dream and that's been portrayed in the past seasons. The writers portrayed Brooke the exact same way she has been but the way Lucas SAW and INTERPRETED Brooke was more superficial. IMO, Brooke has always been independent and Lucas wants someone who, for lack of a better word, needs him.
I don't see how the dream Brooke was any different from the real Brooke. I just didn't like the dream sequence with BL because it was awkward, pushed and there were no real emotions that came out of. Personally, it was belittling BL and their relationship.