Now google implemented this useful feature in the upcoming android 6.
For example, whatsapp will request one time permission request to use mic, when we tap on record voice message icon. So doze recognizes whether the user asleep or kept in a table and saves battery according to the needs. Furthermore, you can restore bricked moto x play device by flashing this stock lollipop firmware on it.
It seems that tech giants like samsung are following the apple iphone and google nexus way. So users can type in the search bar at the top of app menu to find required app. So only some mid-range devices, some old flagships and sony flagships have microsd slot. Users can disable app standby mode for any apps and can enable it. Upto android lollipop all android versions feature horizontally scrollable app menu.
Most devices may show a date of last month because, most tech giants recently started the rollout of monthly security updates due to stage fright issue.
When users want to change or view the permission setting for any app later, they can do that in the settings.