I think they need to do something with the UI. Change the look of the icons or something. That ugly Youtube tv set icon needs updating. I don't care if they made the calendar icon change from red,blue, yellow etc. Maybe not lock everything to a grid or let me hide things I don't want without having to jailbreak
I wouldn't mind having weather on my lock screen or other things that I want to see at a quick glance.
There's not a whole lot that you could probably do unless they're going to implement a card type system but I think it's time for a refresh.
I may be missing the point about reminders but I think that should be in the Calendar app.
At the very least the iPad should get a refresh. Wasting a lot of screen real estate