Here is my own opinion. Subjective. Just some random thoughts...
iOS has became boring. Pretty boring. And somewhat non intuitive. Here are the reasons for my opinion:
1) List of icons in a grid. Pretty damn boring. And unintuitive. I mean, if I have just 4 icons on iPhone 7+, why can't I put them on the bottom of the display? Easier to reach, and looks better since there is already dock with app icons there.
And ditch this grid of icons already. As someone said here, I also use a plain black wallpaper, since it makes no sense to use wallpaper at all. It's hidden behind numerous icons.
2) Phone app is simply outdated. It was outdated when first iPhone came out, but now it's simply a joke. Why can't Apple implement smart dial like even prehistoric phones had? Much easier to call someone. On iOS I have to scroll and scroll... Or use full keyboard to search. Again, unintuitive.
3) I don't need much of customizations. All I want is simple ways to set some ringtones, and simple stuff like that. I don't need widgets on homescreen (but would love them), but I simply hate when all I can see is app icon after app icon.
Setting sounds for alarm, phone calls, media, etc. -> pretty unintuitive as well when compared to Android.
I could go on and on, but these are some really basic stuff. I'm not asking for a full revamp of iOS. Quite the opposite. Just some small tweaks.
Someone here said 'basic' users love iOS. My father is 76 years old. He was using iPhone for 5 years. I bought him a Sony phone last Christmas. He loves it. And I mean loves it. For him, way better then iPhone. Easier to use. And he can't even use a PC/Mac. I have tried for long to get him to learn to surf the internet on a PC, but I have failed.
If you can use iOS, you can use Android. Even if you are 90yr. old nanny. Period
P.S.
I love Apple ecosystem. I use android and iOS. But if I were to ditch mac for example, I wouldn't even consider buying an iPhone anymore. Only reason I buy iPhone in the first place is because of my MBP/iMac and ecosystem. Apple really needs to start working on their software. But I'm afraid that things will remain the same until sales drop. So iOS will be the same for a long time