From memory, here is roughly one of Joe’s points from coffee last Friday:
i.e. “Saviour” is just another title that Jesus has, like “King”, “Judge”, etc. regardless of what He does.
Now personally, I do think that he judges everyone, just that some will call upon Christ to the be their representative, whilst others won’t, and that will make a difference to the short/medium term outcome. Secondly, I think it’s strange to be given the title of Saviour, if you don’t actually save everyone who you could (& I’d argue want to).