I don't like pk shootouts either. I just find it's a really unsatisfying way to end a game. I don't really know how that could be solved though since obviously you can't keep the players on for much longer then they are. The idea of more substitutions I kind of dig. I would also definitely prefer the Golden Goal.

Golden goal came and left the doors guys because it didnt reflect at the end the game situation either. PK was invented by germans and even is the old method, it came back after FIFA tried the golden goal. PK give equal chances to each team and shows your physical and mental preparation at the end and it is not just a coin flip situation becuase you actually have to be prepare to shoot out Penalties and also as goal keeper to stop them (it is not an easy task as everyones may thinks to either side) So for now, there is no other way.

golden ball after the first two extra periods.