These are few of the Windows Phone update 1 features / changes missing from the official changelog.
1) Alarms now have snooze timings. Go to Apps homescreen—->Alarms
2) Not sure if everyone got this. But speech has setting “improve recognition for non-native speakers. Settings—-> Speech
3) Windows Phone store Live Tile settings, Go to store—->settings and scroll to bottom
4) Internet sharing over Bluetooth. Settings—–> Internet Sharing
We will bring video hands-on demo of all these features + creating and managing Live folders soon. Stay tuned!!
As always our Windows Phone 8.1 update 1 page is your best bet to read all that this GDR1 update brings in one place.