My takes.

I think it would be nice to be able to automatically skip ending and starting cutscene during challenges with a on off setting to reduce waiting time. And skip the finishing screen and go straight back to game play and or I think I would enjoy challenges more if they where more seamless with general gameplay. On other notes, I would like to see more Returning tricks from skate 3 like dark sides. And a little more push power on your first push would be nice. And a general way of getting area experience outside of challenges would be fun and promote not only playing challenges. Then I know out of scope right now but a custom park builder would be so much fun. So im not limited to the 5 quick drop objects you know.