I'm all for ME1-styled romance scenes in DA2, since it was handled so well then and I'm sure it can be handled well now, especially with the improved graphics.
As for having children, it seems a bit... strange to me. I'm not sure how they'd handle that. They'd either have to make separate pregnant body models or let you magically have a child during one of the time jumps, which could be awkward.
If it is done, I'm confident they'd handle it well. But I don't see it being done at this point.
I'm personally hoping for altered dialogue with your LI during cutscenes/combat, and for people to react to you being with a pirate/mage/elf/dwarf, like I'd hoped for with ME2. (replace pirate, mage, elf and dwarf with quarian, turian, drell, crazed biotic and Cerberus operatives).