This one agrees with much of your post.

An excellent inquiry.
The point would be that, in pursuing sorcery, one has forsaken certain avenues. One decided to become a twisted nugget of evil magic and probably wishes to accomplish goals in that way.

We already have daggers, why did we need katanas?
The same concept applies, a different option of how to accomplish the same goal.
Why do we need explosive jars, explosive arrows, and explosive orbs?
Vigilance must be maintained to avoid it becoming a carbon copy and too samey, but harvest resources is just a fast mid grade pickaxe. But it feels different. It feels correct in context. It accomplishes the same goal, but does so in the way a Sorcerer would.

@Scorpy , there are few utile lists online.
But you may find a cliffnotes version of Hour of the Dragon a good start, then Red Nails.
Funcom loves cleaving to their Howard, so for best results, focus on first principles