A simple Master Limiter plugin after the effect(s) needed would compensate. Use the Fader to control the input into the final chain of effects (which on my system is always at full up), and use something like PGPeakLimit (last in the chain) to control the actual final output. Of course other tools will give more accurate results for measuring levels in different ways than PGPeakLimit, but it would be servicable to some extent, especially if you comparing by ear to other recording software.

This may be a feature for mastering. I can put my mastering effects in the final output slots and trust that what comes out of them is what I am getting for a digital mixdown, it's not altered through another slider afterwards..when levels count. How would you measure a signal after the final slider then? Just your soundcard mixer VU's? Or another standalone?
I kinda like the idea for some applications.

I do not work here, but the benefits are still awesome
Make your sound your own!