On the bit with Marsh. I disagree that Kelsier used his power to give Marsh the ability to rip out the earring. He just made sure he had the information he needed to know what to do. Without Kelsier he wouldn't have known to pull the earring out. However, Marsh still needed the willpower to overcome Ruin enough to actually do it. Kesier did not do that, just gave Marsh knowledge needed to accomplish it.
I cannot comment on the other two as I did not have a strong feeling for them. As a whole I personally really loved the novella. The whole background cosmere stuff I find interesting. I also like the idea that Kelsier's whole thing of "surviving" even permeated through death. Even death could not kill Kelsier.