I was reading through the rules and am not sure I understand sorting the piles of cards for the full game. What is the point of having all the different piles - to allow multiple players to look at cards at the same time? Any other purpose?
Also, am I understanding rightly that in round two there will in the end be a single pile with 8 round 2 cards and 4 round 1 cards? Also, in round 3 there would be 8 round 3 cards and 4 round 2 cards?
Why does it matter if the final pile starts with the a card with the number of the relevant round (another rule)?
Pretty much the only reason for all the different piles is as you said... it allows multiple people to look at the same time.
I guess the reason to start with a card of the relevant round is that it ensures a high impact card will start the round since the cards get more extreme as the rounds get higher.