Yes, I know that a lot of people want the old pictures or music app back, but really, it is better now than before:
In the past, the "system apps" (pictures, calendar, music, etc) were not "upgradeable", it need a system update (GDR, for example), and it is the wrong way because we need to wait until a the next system update.
Now, with Windows Phone 8.1, that apps are upgradeables from the Store, like in Windows 8.1, and it is the best way, because any system app can be upgradeable for bug fixes and new features.
If you are requesting that old apps, then you want the old way.
And remember, that apps (not the system) are beta/not finished versions.
In the past, the "system apps" (pictures, calendar, music, etc) were not "upgradeable", it need a system update (GDR, for example), and it is the wrong way because we need to wait until a the next system update.
Now, with Windows Phone 8.1, that apps are upgradeables from the Store, like in Windows 8.1, and it is the best way, because any system app can be upgradeable for bug fixes and new features.
If you are requesting that old apps, then you want the old way.
And remember, that apps (not the system) are beta/not finished versions.