I've tested the update in 12.10 with NVIDIA drivers. Using "phoronix-test-suite run pts/openarena-1.5.0" I go from 25.47 FPS to 47.40 FPS. Yay for 50% improvements! No noticable regressions.
I'm not marking as verification-done yet, since this is hardware-oriented fix and such SRUs need "at least two positive, no negative testimonials."