I only have one proposal at present. 

I'd love the option to set the apps to populate from the bottom. 

I only have my most used apps pinned (~10), and having them positioned towards the bottom of the screen would make them more accessible without having to reach up so far to tap them.

It's a small thing, that wouldn't really benefit anyone with more apps pinned in AppCore, but would make for a smoother flow for someone who is keeping things minimal.