The IC mechanism of Soul Strand loss is due to the strain of death (i.e. one of the strands that tethers a soul to a body snaps as the soul attempts to leave the body on death), not the strain of returning to life. That's presented as an FYI. The only comment on loss of play time I have is that it really hurts people who don't have a lot of time to play, don't have time or desire to invest time into backup characters, etc. Remember, people play to have fun, which is part of the basis for this discussion in the first place...it's not fun to lose one's character...it's not fun to not be able to play for a day, etc.
I still agree with Jrizz. Though Dorg, It ultimately comes down to how much leeway you're (as the team, Leanthar, etc) are willing to make lore wise, or how much you're willing to change something in general to make something better mechanic wise, or something that the players and later, consumers would like to compromise with you with in edging the end of NWN layonara. If the answer to that is none, then this argument is null from the get go
I'm only currently commenting on thing that have significant barriers to their implementation. I did not say anything about your first idea for that reason. That should not be seen as an endorsement either.As for how one might interpret death, well...people are free to interpret death as they see fit, but when we get right down to the IC mechanics of death, that's not how it works. I think it's a bit of a misconception personally that the Soul Mother collects Soul Strands...she doesn't. She collects souls. Strands are simply the thing that keeps one's soul tethered to one's body, and they can only take so much strain. Think of them as little rubber bands.