HwKeeper
I looked at the hero skills on the wiki: class abilities, abilities, special abilities, and unique abilities. For everyone except the Barbarian, everything is interconnected from the original and Hammers of Fate. In the original and Hammers of Fate, the paths to unique abilities are one thing, but in the expansion for these seven factions, they are completely different. There are also various branches from regular abilities. The screenshots show the differences in the connections between the original with Hammers of Fate and the expansion.
There should also be a bunch of cards for the seven factions with the connections from the expansion. Maybe I just don't see the whole picture as it was intended here. Ideally, of course, all these cards should be used to make a skill wheel in the Heroes 5 section.
Yes, the connections were mixed up from different expansions.
I think I updated it so that each expansion only has its own connections, but it needs to be checked.
I additionally added the display of connections to the comparison page, so the differences should now be clearly visible.