As of 4:54 PM EST today, @HaloSupport tweeted out that a fix has been applied to ranked CSR rewards. Correspondingly, as of about 3:15PM EST, I see matches appearing with counterfactual values more in line with pre-update values. I've restored the original PSR computations accordingly.

I wouldn't expect Halo to retroactively update ranks or game data from the period when this issue was present, so any matches from the launch of CU29 to this point are just going to have some bizarre looking data forever. Best thing we can do is generate new data (aka, play the game) and put this fiasco behind us.