Cameras, from what the rumours are saying they are only improving the ultrawide, by bumping it up to 50mp. But what about the main camera?What hardware would you have them focus on?
Maybe a complete redesign of the camera placement.
Reduce the bezels or eliminate them entirely.
Make improvements to the display, maybe more energy efficient.
more S-Pen features.
Improve face recognition, Face ID on iPhone is a lot better.
more colour options - the rumoured ones this year are very muted. What happened to the red, purple of old.
Also not removing the Bluetooth in the s-pen, that's a down grade if it also removes air gestures.