Ok this is the realist in me about to speak......I don't see them doing much to iOS even for iOS 13. And with the Mac upgrade to Mojave making Mac OS EVEN MORE iOS like, that seems to prove the point. What they need to do is simply bring a new direction to iOS and give it something you cant get anywhere else. This is why we pay them so much for products, they should be able to figure it out. What they haven't done yet is bring the best parts of Watch OS to iOS. And as much as I want it, bringing a mouse to iOS is just not the right answer. It means that iOS would feel almost like a toy with such giant buttons, etc.
Basically iOS on steroids:
1. Default apps (this would be huge more so than people may think)
2. Home Screen with complications, imagine how useful that would be having all that info at a glance compared to the watch.
3. Better file system even if its simply for managing files ON the iPad. I dont car about accessing the core system. Just allow us to manage whatever files and folders we want locally. (Problem is you would then need a full Mac OS for backups, etc, etc.)
I'm sure all of this is being talked about at Apple HQ. They aren't stupid. Where they fall short is calling the iPad Pro a laptop replacement. For many it really is, for tons of average daily tasks its a delight and I love it. But when you start calling something a PRO device and start raising the price to be equal to what people use to get real, time sensitive work done, the iPad Pro is simply not it for at least 50 percent of high end users.
Which brings me to the core(haha) of Apple's problem. It's not iPhone XR or iPad Pro or whatever people want to troll or complain about. ITS ABOUT MESSAGING. Ever since Apple watch was introduced , they have stumbled year after year on messaging for just about every product. They don't tell compelling stories anymore about why I NEED to throw money at them. And thats what the job of a good marketer is supposed to do. Personally I think Phil Schiller is just running out of gas. He has been there for 20+ years and Apple is now a behemoth. Its no easy task but maybe its time for some fresh blood to come in. Steve is dead and Tim is simply not a visionary even if he is a good leader, which I personally think he is for one reason, taking privacy and data more seriously than any other tech company. The only really neat thing they did recently is the "whats a computer" iPad commercial. Love it or hate it everyone knows about it. It generated a lot of buzz either way.
that is VERY impressive! 
