I'm voting for a plug-in, but I don't know if it should be marked as a plug-in...
I'm talking about the Function
I fell in love with it and I've been using it in all my projects. It makes events more flexible and you can create a chain of events more easily (with the "on complete"-something-something). I only question it being a Plugin: I believe the Functions should be a part of the System events - just like a FOR, for example.
Just throwing a thought here, but I believe events that are transformed in functions could have a different, very light, background color to them.
Maybe this is something worth adding later (Families should be more useful right now...), but I wanted to share my thoughts about the Function plugin here