Hey Larry,
Good story, although now you've spoiled it for when I get that far down your timeline on my site! j/k
I don't mind certain people taking centre stage in a story as long as it's not all the time, and it's not obviously "Look at me! Aren't I just super-fabulous!"-type stories. It was well told, competently executed, introduced new up-and-coming characters as well as revisiting old friends (which I always like), and believable (maybe except for Klingons apologising to each other! *grin*). I liked that your pet Fusion (you know who I mean!) and Leral got their promotions at the end, it made the story end on a surprise up. That's nice too. :-)
As to the Nephew/Mafioso-style switch, I agree with Grim and think you need to elaborate more on Prynn's organisation. Say that although it is a multi-species, employer-employee-style "trading house", the major positions of responisibilty are held by the family members. Just add some of the Godfather style elements in, to explain why Prynn is so honour-bound to pay of this debt.
Keep up the good work though!