Either way, both methods would involve a delay because Set View Target with Blend cannot execute until all players have a controller assigned, and in a multiplayer game this can take time. You can use a loading screen or something similar to hide this, or use Spectator Pawn as default and then spawn in and possess new pawns after controller has been created.
I’m not certain why Post Login event isn’t working anymore… I’ll need to dig into that. It was working when I posted that image but apparently is not any more. I’ll let you know what I find.