Regular viewers will know I'm not a numbers person. I don't dig them digits. I'm a wooly-headed "feeling" person when I'm playing CoH, but you asked for opinions, here's mine.
Firstly, sorry to generalise, because many of these powers have very cool effects with some quite potent buffs, BUT... all Self-Rez powers seem like a dumb waste because 90% of the time you either have, can make or be given a Wakey. That's why I like it when they attach a bunch of other buff-guff to Self-Rez powers.
I like the idea that Soul Transfer has to have an enemy nearby, but
it's so hard to remember about your self-rez because you die so little these days
especially in a team, and
even if you die in a team, there are dedicated healers who want to bring you back with their own powers so they can give their own buff-guff to the group
So adding the idea that you have to have an enemy nearby more or less puts the final nail in Soul Transfer's coffin, for me. It's a skipper.