So, recently was thinking back on Brandon's description of the Ghostbloods while talking with the 17th shard. To summarize very very briefly, Brandon mentioned that the people drawn to Kelsier's organization are very cut throat and competitive (much like their leader). However, those that Kelsier handpicks or directly oversea tend to be more along the lines of what we saw in era 1. So, A thought I had was that the organization draws people more innately like Kelsier. Yet, the ones he prefers to serve under him are more like his old crew in that they serve as the brakes to his acceleration.
As we saw a lot in the first mistborn book Dox, Ham, Breeze, and Clubs all worked hard to curtail some of Kelsier's worst traits. Now given Kelsier's obvious comfort with his own insanity and his egotism I think he is doubtful to try and work very hard to change that. So instead he essentially hires people out to be his own conscience. Particularly given his natural inclination to like innately good people even while not being one himself.
Afterword
Thank you to those who read this. Kind of random but I guess I am feeling the withdrawal of cosmere content and wanted to voice some thoughts. If you have comments, contradictions, or just wish to talk more I encourage you to comment. Hope you all have a great day, night, etc. Just keep in mind, "There's always another secret."