Thanks!
Looking at the Q&A, it seems that when 9 of the Heralds decided not to go back to Braize (only Taln went as he'd died), that kept the Connection somewhat open, which may explain why the Voidspren Ulim managed to escape Braize for Roshar?
Sorry I need to ask about point 2. Are you saying that when Odium managed the Fused returns it was only possible for them to return once per Desolation, but now - as you say, during a more 'natural' process - they can return (be reincarnated) as many times as they want, because Odium is not personally dealing with the process...?
Do we know what exactly, the ins and outs, it is that allows the Fused to come back as many times as they want this time around? It seems like a powerful ability, which was hampered before by Odium... The Fused are the most powerful soldiers of Odium, so why would he have stopped them from coming back infinitely before...?