Should I worry about the Kioxia EXCERIA PRO 1TB write speed dropping and causing stutters during large saves or level loads in Nioh 2?

Every time I hit a complex combat settlement screen, the loading bar would just hang at 90% for several seconds, which honestly gave me a lot of anxiety. I found that once the dynamic SLC cache on the Kioxia EXCERIA PRO 1TB hits 70% capacity, the write speed craters from 5000MB/s to around 1200MB/s, causing a massive I/O queue backup. I tried using a third-party defrag tool first, but that was a huge mistake—it didn't help the speed and just added 2GB to the SSD's wear count. After that failure, I decided to go the partitioning route. I carved out 10% of the drive as unallocated space for over-provisioning and used a professional tool for 4K alignment. In subsequent tests, the write speed stabilized between 3800-4200MB/s instead of swinging wildly between 1200-4500MB/s, cutting load times by nearly 40%. I actually tried 20% over-provisioning first, but the game had trouble finding the save path until I dialed it back to 10%. Temps are steady at 48-56℃. I verified the I/O throughput with a performance analyzer and it's finally where it needs to be.