Well, you could choose to set Gamblin' Jack free of the slave bracelet, after you buy him.
Regarding the main, the description when we die don't correspond to being revived, bringing into the discussion question 7: what one remembers when is revived. Does one remember his death, feeling the fatal blow, or is that last part just a blur?
Another question is what is a soul (at least in the Telepath world sense). But I'll leave that question alone. Anyone who wishes may start a new thread about it... I'm expecting that to be a polemic issue (and fun to discuss).
9. Your suggestion, im2smart4u, is that Nelis may be able to "track" the soul from the thought impressions left by the one to be revived? I think that idea fits better than mine in the Telepath world. So, in order to someone to be revived, some personal item needs to be within some range of Nelis (perhaps being anywhere in Somnus is close enough). And if someone on the team died before he/she went to Somnus the first time, it might not be hard to assume that some personal object was brought by one of the team mates even that the thought impressions were all over the ones which returned.
I agree with KZ that reviving takes some time (at least the few minutes the Main is talking with Negatus and the time it takes the Main to reach the Headquarters after that).