Does anyone do this with reverb and delay outside of S-Gear?

I quite like the effect of slightly ducking both delay and reverb (so that it doesn't pump back in when you finish playing). Even a few db reduction while playing works really well IMO.

The nice thing about an all-in-one plugin like S-Gear, is that an option like this could be added in a simple way. In something like RoomThing, the hidden parameter menu could hold the level of ducking, release time etc.