Mine is still low despite the pair of changes above. With my Moto X, the volume was fine at the mid-range, which left room for improvement when I needed to increase the volume for whatever reason. I'm just curious if those of you not having this issue are at least finding that the volume needs to be all the way up for the volume to be acceptable.
And while we are on the subject of speakers, some of my audible alarms (text, email, etc) sound like 'sour' notes as compared to what I'm used to hearing from my Moto X. Not sure if that is an issue either.