[Closed] XT cassette rotational movement

I've got an 10 speed XT cassette that's a 2-3 months old, on a Pro II hub that's 2-3 years old. Last night I noticed that the 3 biggest sprockets have some rotational play.

I checked the lock ring and it's tightened properly. Then I took the cassette off and the cassette body is a bit chewed up where the smaller individual sprockets sit, but the end where the sprockets are on carriers looked OK.

Is it time for a new cassette body? I run 1x10 should I be looking to replace it with a steel one?

Thanks