A long press of the 0 key will always jump 10 pages, even in the bookshelf, I believe, just as you asked for in item two. the 9 key long press jumps 10 pages back. Also works in a TOC as I recall.
As to point 3 there is already that feature pretty much everytime. You can lock the buttons manually but the device already shuts down between page presses. The purpose of the lock is to make sure the buttons do not get pressed accidentally when you are carrying it around.
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