"Find Friends" and "Find iPhone" have both been pre-installed, and aren't removable.
Can't see the "News" app in the UK.
"iCloud Drive" prompted to add to the homescreen during the initial setup after the upgrade to iOS9 (also available to toggle on/off via the settings)
Notification Centre options have changed, before they were "included" and "not included" in the Notitication Centre, now they all appear to be grouped together and instead of sorted in the order I had them they are sorted by "Recent"...
Facetime auto logs in (wasn't logged in pre-iOS9 update)
Anyone know how you can remove (or change) the "news" that appears on the Siri Assistant screen when you swipe across from the homescreen? It doesn't show if you swipe the screen down (not the notification view, but the search that appears) but does from the swiping across.
Spotlight search appears to have re-enabled lots of stuff I'd previously switched off. Never use Spotlight search though and maybe a previous update in the 8.x had re-enabled them. Is there really no way to turn them all off....!? Has a "show more" (goes from 4 to 8 stories) and "show less" but doesn't seem any other option.
Siri hasn't auto enabled itself, which is a bit of a surprise seeing as other things have. I thought Apple might try to push that again, now it's supposedly more useful.
The pin code hasn't prompted for a 6 digit code despite being Touch ID enabled. It was happy to let me login with the usual 4 digits.
"Upgrade Notes" link in the Notes app isn't to give you notes about what has been upgraded (as I thought and hoped) but just "upgrades Notes" to the new version, which presumably it had already done anyway. Now appears to support folders (and no way to turn that folders screen off?), and there's excessive spacing between each of the notes. I want the old one back...