No way to modify team scores with events

Slayer is great for combat themed minigames but I would like to use it for soccer. Except I can't because there is no way to modify team scores with events.

Sure I could just event everything from ground up but Slayer gives me a nice base to build on. In fact, for a simple soccer all I need is two Slayer teams, team spawns, and these events. The scoring and round restarts would be handled by Slayer which works just fine.