Entropy still declines at b=16 (0.28 at 5k) but slower than before. α_max raised 0.5→2.0, λ lowered 0.1→0.01. wr=0.38. The b=16 environment is too sparse for the SAC auto-tuning to maintain entropy. b=1024 with 60× denser Q signal should produce different dynamics. Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>