I don't mind the loss of soulstrands. Though I think the raised DC becomes a bit harsh and unforgiving at higher levels.Plenty of people that still die a lot at lvl 17-20, which makes a 17-20 % chance a bit harsh at that point. And not sure it makes sense for me that powerful people are quicker to have strands tethered. Because a higher level doesn't necessarily translate to age or other possible reasons that they could be somehow weaker. (think elves and dwarves with longer life expectancy)