Lately i'm looking at low light footage with my m2p and it's all terriably noisy but when i look at the footage I shot when I first got it it was much less noisy. All same conditions. Could there be long term use issues with the hassleblad sensors? anyone else noticing this?

Nope, have had mine since launch.  No degradation.

That should not change.
But it is hard to judge, since there are a lot of variables.

Pehaps your iso is to high.

Hi, I am sorry to know that you are having trouble with your DJI Mavic 2 Pro. With regards to the said issue. Please try to adjust the camera settings to isolate the issue and if issue still persists, please provide us a sample footage for us to be able to provide better assistance. Thank you for your understanding.