Post mortem nen was supposed to be a somewhat rare and spontaneous occurance. But in this arc, that randomness is being thrown out of the window. I simply don't like that.Still think you need to (re)read 389 with the official translation (unless you already have). They can control post-mortem Nen so well because it's limited to the Have-Nots and the relationship their ancestors had with the royals (and, y'know, because they're literally drinking something connected to the target).
I don't think it is. It didn't feel valid to me. I believe it would have been much better if Futataki had an ability like the one I described above, as it uses the consistent side of the nen system. At least like that, Futataki's predictions would have made sense.The effectiveness/time knowledge is a valid comment, but Fukataki was the only one who was aware of that, so it's not like every Have-Not can ascertain it.
Would love to hear your opinion on this power I posted above, and also, do you have a Hatsu in mind that you wanna share?