The feature You talking about is the “copy character” which you do via playthrough and not through the character creation screen when you firstly start on a map.
The feature I’m suggesting is for the online mostly. And there is no rebirth feature for neither online nor signle player.
The “newborn & rebirth” feature I’m suggesting for the online will benefit the players who don’t have the skill to make a new character fully maxed in 3 hours within one day just like those who have the skill, and it’ll be less time consuming leaving a player to deal with material collecting, base building, gear searching and thrall hunting, or they can choose newborn to start all over again.
Also the single player due to the bugs of the resent update and of the past, is no longer playable.