The idea is that the areas which were explored in the first round will become less valuable in the second round, since the contact map becomes more saturated in those areas. However, the saturation doesn't appear to be enough to actually discourage people from using their old solutions.

Loading in solutions from the previous rounds isn't supposed to give a huge unfair advantage to people who were competitive in the last round (as it does right now). The real purpose is to give you starting points at the fringe of exploration that you can then use to branch out from during the second round.

We could just give you guys the starting structure as we did in the first round, but you'd end up having to do so much work just to get out of the well-explored areas that you wouldn't get much actual exploring done. We don't want you guys spending hours trying to replicate work from previous rounds by hand.