I'm glad that you can optionally enable full mitigation. I'd rather run at maximum speed with issues, since these attacks don't really affect my home machines at all.
Don’t bother turning off HT. There is no “full mitigation” as claimed by Apple.
According to WCCFTECH, “Intel is not recommending that Intel® HT be disabled, and it’s important to understand that doing so does not alone provide protection against MDS.“