I admit, my title is misleading. This is a list of mostly "not likes" with iOS 11. Why few "likes"? Because there is enough written elsewhere singing the praises of iOS 11 and detailing "what's new". Maybe my dislikes will help you decide if (when) you want to upgrade...

Not Like

I'm sure this list will only grow. Here goes:

Control Center

• Swiping up from the bottom of the screen no longer gets me to the Control Center. Instead it reveals the Dock and recent apps.

• Continuing to swipe up finally displays the Control Center, but the Control Center cannot easily be dismissed to get back to the prior app. Swiping down no longer does anything. Plus: four-finger swipe up gets you to the same place - redundancy!

• Instead, clicking on a blank area gets you to the home screen instead of the app I was actually using at that time. Now I've got to hunt-and-tap on the app screenshot, which is such a hassle. I'd bet this is just to cater for that overpriced monstrosity, iPhone X.

• The Control Center Wi-fi and Bluetooth icons don't actually turn off Wi-fi and Bluetooth! They merely disconnect from a connected device or network which doesn't do anything for conserving battery or for security. This is well reported by now.

• And where is AirDrop pray tell? I keep Bluetooth turned off unless I need it (security, you know, even AirDrop had a critical security flaw in 2015). In iOS 11, I could temporarily change AirDrop from "Receiving Off" to "Everyone" in Control Center, and it would automatically turn on Bluetooth. When done,I cloud turn off Bluetooth, and it would reset AirDrop to "Receiving Off". Now it's super tedious to temporarily enable AirDrop to receive a file, involving many steps in Settings.

• Good grief, Night Shift is missing just like AirDrop. Not really - it's hidden. Long press the brightness slider and you'll find it. But why bother with Customizable Controls when previously useful toggles are not in the list?

• Long pressing buttons like Silent Mode and Rotation Lock in the Control Center that don't support additional actions causes the screen to flash.

• In addition, it often does not draw correctly and doesn't obscure the contents underneath, making Control Center an unusable mess, i.e.

Notification Center

• Swipe down from the top of the screen to open the Notification Center, then swipe right to get to the Widgets. And at the bottom, you'll notice "Press Home to open", which makes no sense! Pressing Home closes the Notification Center, and opens nothing. In any case, all of us are already conditioned to swipe up from the bottom to close the Notification Center.

• And what happened to my two-column Widget layout? Now I have wasted screen real-estate on my large iPad. Why kill a useful feature?!

• I dislike that swiping left opens the camera, since I can't swipe right to get back. Pressing the Home button gets you back to the Notification Center, which is totally wrong to me, since pressing Home should always get me back to my home screen. I prefer my old Notification Center workflow.

• I use launcher widgets, e.g. Magic Launcher and Launcher with Multiple Widgets, but Apple no longer allows settings launchers. The devs of the former report that "Apple no longer allows third-party apps access iOS Settings because of user's privacy" (which is ridiculous), while the devs of the latter have a FAQ page with a couple more issues. When widgets first were introduced, devs introduced many creative ones, but Apple quickly stomped them out. Soon, we will have to say "bye-bye" to launchers too.

Multi-Tasking

• Can't swipe from the right edge of the screen to run a second app. Now it's swipe up, tap and wait on an app icon, drag it up, and if the app can, it'll run in a "floating" window. There is no indication whether the app can or can't run in a window.

• If the app is "floating" on the right of the screen, just swipe the top "handle" to the right and the app goes away. But if the app is "floating" on the left of the screen, swiping left does noting and swiping right moves it to "float" on the right instead. Weird.

• Four-finger pinch to return to the home screen seems more sluggish. Either that or the "minimize" animation is truncated early making the transition look abrupt as if the device is too busy to animate smoothly.

Etc.

• I don't get it. I can't save to Files locally. One can only save to iCloud, so isn't this just the-app-that-used-to-be-called iCloud Drive? Luckily there is Documents by Readdle, which not only allows me to save files on my iPad, but also supports drag-and-drop in iOS 11 - just grab a file from Mail or a picture from Safari while multi-tasking. Nice.

• IBM Verse contacts sync is broken, likely because Apple. I doubt this will affect many people.

• I'm still on the fence about this: Siri off-line should sound more natural (after all the voice file for Siri Female US increased from 189 MB on iOS 10, to 497MB on iOS 11), but it doesn't to me. Maybe I should give the new Siri a chance. In any case,...

• Apple didn't make the new voice file available on iOS 10.

Briefly, from Settings:

• Go down this rabbit-hole: General > Accessibility > Speech > Voices > English > Siri Female (I'm using the US voice), and check Siri Female.
• Then, under Accessibility > Speech, enable Speak Screen.
• Now, open a book in iBooks, swipe down from the top of the screen with two fingers, and Siri will read the page... and turn the page to keep reading, even while the phone is locked and the screen is off! Some times though, pictures and chapter breaks halt the text-to-speech.