FX Bus dial's middle position - no signal sent option?

I like to fade in some reverb, from zero reverb to full on reverb, at different times on various layers using automation in Backbone. This, and other creative fx use, is rather tricky, if not impossible, at the moment with the FX Bus dial’s middle position sending equal parts of the signal to each of the busses.

Can we have an extra option for how the FX Bus dial is configured or an extra Bus Routing option:-

FX Bus dial’s middle position sending no parts of the signal to either of the busses. So the dials goes from the centre anticlockwise to increase the signal sent to FX1 from 0% to 100% and from the centre clockwise to increase the signal sent to FX2 from 0% to 100%.

Or even better:-

Two separate send dials:- one for FX1 and one for FX2.