I gave up putting stuff like reverb on the master bus and now I use a dedicated reverb bus, and use sends on individual instruments or submix buses. The reverb plug on the reverb bus is set to 100% wet signal, and I control the submix or instrument level into the reverb bus with the send gain knob, and control the overall mix of reverb with the reverb bus fader. This sounds much more natural to my ear than other methods I've tried.