I'm not overly keen on application updates being tied in with OS updates (though in some cases the two may go hand in hand - eg. gallery and media filtering).

Anyway, this probably isn't exhaustive, and for what little it's worth:

OS/Phone:

* Allow non-Jolla applications to have their settings via System (maybe provide an incentive for developers to use it by allowing backup of any settings there).

* Put Settings shortcuts into Eventview (I know there's a patch).

* Add vibrate, airplane and/or connectivity, screen brightness, low power mode, etc. settings to ambiences. Will turn them into proper profiles and mean one change can be used to switch important settings (silence, some sounds, connectivity, etc).

* When creating an ambience, give option of "use default settings" or "use current settings".

* The data connectivity pop-up is better now, but would be nice to be able to definitively control it.

* Make it easier to switch between icon sets. For example have a folder of sets that need to conform to a standard naming and/or structure, then allow user to select one in Settings. Maybe also add this setting to ambiences.

* OpenVPn

Calendar:

* Improved views (weekly, extended monthly, etc)
* Manually add/delete calendars
* Manually add entries to Birthday calendar
* More sophisticated repetition settings
* Calendar backup
* Default reminder setting
* Default calendar setting

People:

* Add a notes field

Gallery:

* Any method that allows filtering album art from the image list, without affecting the music files from being detected.

Ringtones:

* If you select a file to use as ringtone, alarm, etc., it gives you the option to copy it to the ringtone dir. You can do this manually, but it would save some effort if it did it for you.

Weather:

* Allow other weather providers - esp. UKMO.
* Add ability to add forecast to display - eg next 3 hours, tomorrow.
* Add ability to display precipitation probability, wind speed and direction.