This is really quite cynical, particularly about sound amplifier. It should be very useful to the millions of people who are hearing impaired, but haven't gotten a hearing aid yet. (Most people tend to put this off for a while.)
There's some irony that some folks might have gotten hearing loss from headphones in the first place, but it sounds like a useful feature.
It will be useful to me, but there's already a volume button. Would be nice if that just worked, instead of it being nerfed.
The volume limitations only made sense if you never used headphones less sensitive than the oem ones and listened to source audio that was only at maximum volume all the time.
But Sound Amplifier isn't about making the phone's audio louder - its purpose is to amplify the sound in the room around you and filter background noise. I think you're misunderstanding the feature.
There's some irony that some folks might have gotten hearing loss from headphones in the first place, but it sounds like a useful feature.