Customisation options for iOS 11 iPad dock?

iOS 11 looks great. Can anyone running the iOS 11 beta on the new 10.5" iPad Pro tell me more about how customisable the dock is?

Is it a fixed thing that the three icons on the right of the dock are used for the user's most-recently-used apps and the rest of the icons to the left of them are left for the user to drag and drop icons onto to set up a fixed set as for the existing iOS dock or can how much of the dock is used for the user-defined apps vs the most-recently-used apps be configured in some way, i.e. use more or less of the dock for user-defined vs most-recent apps - maybe even being able to hide the most-recently-used section altogether so that the full dock width can be set up by the user as they want? I would probably do the latter if I could.

Also, I wonder whether we will have the option to put more apps on the home screen by the time iOS 11 gets to full release status. I found the 4 x 5 grid (or 5 x 4 in landscape) too sparse even on my 9.7" iPad and it looks even worse on my 10.5" iPad Pro. One thing I really like about the new dock, at least from the screenshots and videos that I've seen, is its tighter icon packing so I hope some of that tighter packing finds its way to the main bit of the home screen as well.