1) The Icon-Pack often changes with the strange Xiaomi Themes you might download. Chose them wisely so they do not upset you.
2) seems to be a seldom bug, never accrued to me. All I know is: there should be no reason for that entry to disappear ever.
3) You can not remove the left direct-link-screen on the lock scrren, but you can take care, there are no clickable links to apps. There is an edit button and you can simply remove all or all unwanted entries.
Any more questions?
Btw: What's up with the weeklys? Waiting for Mi9SE, MiMix2S, HMNote8
Very appreciating the devs work!!!