The inadequecy of dragon timer (and others)

I like LoL in part because the designers take the interface seriously, so I don't have to spend too long configuring or programming interface to play decently (think WoW).

So dragon timer is a nice idea. I don't have to get a phone app and set it next to my computer.

But wait, I do. Even in situations where you know for certain they just took dragon, there's no way you can forcibly set the timer to reflect your belief.

In general there are all sorts of places where it would be convenient to set an in-game timer. Why not add this to the interface? It could work something like:

focus, type time, type word, on timer expire beep and word flashes red