Hope you take no offense, but what prevents you to give a macro multiple input to say a gate, and you can always drive a CustomEvent that fires right after EventTick?
(loop with break is a perfect example for multiple input/output with local vars)
To me request raise a big red flag to parallelism, all of a sudden you can now have a wait for something in events, people would then exploit it and then complaint why the performance is bad.
Event are suppose to be fire and forget, you know it will complete, you don’t know when, you don’t know if it ends with success/fail branch, it is suppose to be independent tasks and run off whatever they can get off available variables.
It’s already bad enough if you have one event that relies on result of another, there was a thread I helped debug shows exactly how a problem might occur if you don’t take UE4’s event system serious.