The reason for only allowing one event to fire now is because in UE3 Kismet where you could connect dozens of things to the same events people often ran into sync issues. One arm would be slightly behind on the other arm, would cause bugs, and would then confuse people as to why it didn’t work. So the single execution principle is more a form of safeguard system to enforce proper organization if you wish.
Also S I believe is the shortcut to Sequence (if the public build still has that shortcut).