Yes, I'm aware of those tools, but those are for PEAK levels, I'm talking about average RMS. When finishing a mix I aim for -14 average RMS using several plugins for metering to get close. It's not a rule of course and every song has other factors to consider when level matching. I would think it would save some time to be able to quickly make songs average -14 RMS (or what ever your preference is) and then fine tune from there.