Well, I hate to say it but my solution was to go back to a PCIe 3.0 drive (ADATA 8200). I would rather get a 100% consistent 3300+ MB/s write than the 1000 MB/s I was getting on my gen 4. The results below are after going 3+ weeks without a trim. Perhaps when the next generation of drive controllers is out Ill look into them again.