Linear Effect Scale Data

It would be great to be able to enter (+)#% or /# values in the scale box for linear effects. This would assist in creating linear effects that are relative to the intensity. That way we could change a channels intensity on the fly without having to adjust the scale manually. 

Currently if I set a negative base linear pattern (custom fire flicker effect) with a scale of 50 to a fixture at full . Great effect runs 50-100, but if I change the fixture intensity to 25 then the effect runs -25-25 which looks crazy flickery. I'd like to have the effect instead automatical run 12.5-25 in this case.

This is where a /# value would be useful in the scale box of a linear Effect effectively making it a relative linear Effect.