Please add some idle animations to Yooka-Laylee. I know this isn't very important from a gameplay perspective but its a nice detail in my opinion. No need to add as many as in conkers bad fur day, a handful would be nice though.
Conker probably had the most elaborate ones, but DK64 also had some great variety. I hope they build on that, I think Banjo just had Kazooie pecking his head, right?
Something that would be a nice touch to add in Yooka-Laylee, is that there are unique idle animations that only occur when in a specific themed world. For example: In the snow world, Yooka and Laylee would shivering because of the cold.
Laylee starts picking her nose for several seconds, then gets noticed and swatted by an annoyed Yooka, which causes her to yelp in a high-pitched squeak!