1: There are some camera problems on other devices that Jide (I hope) will be fxing soon
2: I don't own a tablet, but Remix OS works best in landscape mode
3: Remix OS does not support fingerprint readers at this point
4: Remix OS does not support auto-brightness
5: You do not swipe from up top to access notifications and settings. In fact, you can't swipe from any corner at all. You'd have to press a button that looks like 3 little lines going across, located on the bottom-right corner of the screen. Remix OS does not support quick setings either
6: It's probably a tablet issue
7: It's probably compatibility issues with other OSes on this tablet