Just watched a replay of Germany v Norway in the women's U17. It went to a penalty shoot out, which ultimately went to sudden death; found it very confusing seeing one team taking consecutive penalties, especially Norway missing their 5th and then having to take the 6th: Germany won.
Watching it unfold, it almost feels as if you can sense a momentum gathering for one team or the other, something you don't get with the current system. The goalkeeper thus becomes even more important in such situations, and if this system does become the norm, then I can foresee a time when you may even have a specialist keeper that is subbed in for shoot outs.