Why do I get micro-stutters in Expeditions: Rome urban scenes?

While leading my legions, I noticed the screen would 'jump' near complex buildings, a subtle lack of fluidity that really killed the immersion. I tried increasing the system virtual memory to 32GB, but that just added more disk I/O pressure without fixing the stutters, which was incredibly frustrating. I used the GamePP Resource Scheduler to crank the VRAM pre-allocation weight to the max and disabled Windows HAGS. RTSS monitoring showed frame intervals converging to 12-16ms, and HWiNFO64 confirmed VRAM temperatures stable at 72-78℃.