Just do not use Intel RST - it is useless for Linux. Intel uses Optane drive to accelerate QLC SSD drive via RST. Modern TLC SSD drives are faster than Optane + QLC combo. If you can - replace Intel QLC 3D NAND drive with TLC (MLC) solution.
You can use Optane drive as a separate drive. You can put something useful on it - swap file, some system folders, some logs, etc.
Do not use QLC SSDs with BTRFS.