So here I suggest to Bethesda to release a minimal final patch, with just single feature.: Backup save file.
New patched version of FOS game will create backup copy of vault save file on successful vault data save and if it detects main save file is corrupted (due to interruption during save), It will fall back to the backup copy.
I don't expect or request any other improvement or bug fix. Just add function to back up save file.
That is all I want from Bethesda.
.