In my humble opinion too many movies are too overlaid with sound. Yes, all that sound is there, traffic, kids, fridge, aircon, but nobody hears that stuff except microphones. This has been the Hollywood trend over a number of years, slathering on layers and layers of sound that are filling but meaningless. In reality we don't hear most of what's on most movie tracks. We don't hear the aircon or the traffic or clothes rustle or foot scrapes or even the kids outside, unless your kid's outside. Just seems to me there's too much foley in most video and not enough of the essentials of what people actually hear in real life, too much muffled dialog lost in a ton of effects and LFE rumble.
To the point at hand, if you want the audience to hear the guy in the next room, lay the sound the way we hear sound not the way it really is, don't bury the guy in background.