Isnt Orion somehow reincarnating anyway? Or at least was in the past and this time its somehow the last try?It's implied that he remembers for a short while but eventually forgets as some time passes (kinda like how you wake up from a dream and you remember it vividly but as the minutes go on you start to forget some of the specifics until you forget it altogether). Also the difference you're looking for is that he enters Limbo while he's still alive. And now he's not.
Also one of the reasons why I'm reluctant to say in finality that Orion's death and eventual resurrection is the "breaking" that Idriel wants is because it kinda runs counter to the whole "not dying is worse than death" spiel that she talked about prior to the Collector event. If anything, she likely is against any notion of prolonging or bringing life back in an unnatural fashion. And we've already seen in OIAL what a prolonged life does to a person, so there's a high chance she's against that (and is why she wants to liberate the dead from what's likely their unnatural extension of life in Eternum).
But I dunno, guess we'll see in 0.8 how that's gonna play out. Still think that a confrontation or long talk with her is long overdue, and Orion ending up in Limbo could provide that particular opportunity.
Thats how i interpreted the talks from idriel and the syndicate about how they tried everything already and how Orion (or a former version of him) could have been the guy in calypso's story.
I still think Orion will not die tho and Calypso will port him last second to her and heal him.