To tell the truth, I gave it some thought, and I actually do think the idea is solid. More ways to refer to events can't hurt. I don't want to bog down the UI or instructions for more basic users, so here are some thoughts that went through my head:
1. $v# would get interpreted as the RPG Maker variable with the given ID (for example, $v4 would tell it to use the value in variable 4.)
2. If you put something in (parentheses), it is evaluated as Javascript code.
And, of course, anything else is treated like an event ID if it's a number or an event name if it isn't, which is how it already works. I could implement either or both of the above. (But not right now; it's late.)