I too welcome our even volumed overlords. Seriously though, I’d like to see replaygain support across the whole of mt-daapd. My collection is mostly mp3’s, but they’ve been collected from a number of sources, and the volume levels can vary quite wildly. I believe the majority of my files actually contain replaygain values, from a little adventure with scripting a few years ago.
As for transcoded files, wouldn’t that actually be a matter for the transcoding script, and getting whatever is decoding the .ogg or .flac or whatnot to recognize the replaygain values?