And it would make those warnings about your baggage maybe having moved in flight much more notable.

A proper loop will maintain constant positive G's. Wouldn't anticipate too much shifting. You wouldn't even need your seatbelt.

Although I can say from experience, walking around at 1.5 G is uncomfortable, 2 G is downright tricky.

...until all those people, who don't wear seatbelts while seated, end up falling to the ceiling and then falling to the floor.

Anything not held down - imagine all the laptops and electronic gear - flying around the cabin...