GUI Editor for Effects

I mentioned this idea three years ago when I first got my WH3. The sample is attached. Basically when I use the effects engine and change the size, it's hard to see the top and bottom levels, especially when the effect is at a fast rate.
For example, here is a simple one...an alarm beacon effect. Just a simple sine on intensity. But I'm asked to make sure the effect doesn't drop below 20%. The GUI editor that I attached would allow you to see the top and bottom levels as you adjust, giving you more fine tuning ability. I thought it would be cool if you could not only make the changes with the parameter wheels, but by clicking on the graphic and dragging the base or the size. What do you guys think?
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