It's my understanding that this HFM variant exists to reintroduce the functionality removed in 75c07c4. For instance, the following:

eventually became at the tip:

(Correct me if I’m wrong.)

There are however other colonial decisions & events with a historical basis that didn’t use that system, meaning that they are not controlled by the derailroading option at startup. (For instance, the Lagos Slave Trade event that hands out more of the West African coast to the UK.)

Would it make sense to include more historical decisions & events under this system? (Perhaps as a separate setting?) If so, I can submit PRs.

edit: I now have this on my radar, though before I get somebody's expectations too high I'll be doing this piece by piece as I find the time