For "intro_type" "fade", if a player suicides and respawns while survival mode is off, they will no longer sees the dark intro fade anymore.
Similarly, for player_speedmod, if the player suicides and respawns again, their speedmod will change back to normal unless you enable "Suppress attack" spawnflag, which can be problematic because if you died, you won't be able to switch to point_viewcontrol for some reason.