@Thomxs_
1: The main widgets menu does not loop, because you enter it through scroll up swipe, or crown rotate. Down enters the Sport modes list. So how would you make it loop without changing the control logic?
Other menus, e.g. Settings, are linear as well, but I don’t see that as a problem when you have a digital crown and a touch screen available to quickly navigate the menu structure.
One can also argue that looping text menus can be perceived more complex and confusing due to infinite length.
3: Under specific alarm, use Repeat > Customize to select days, then scroll back up and press Select
5: Available in the watch under Progress widget