Traveler get unlock between level 25/35(don't remember) and when you do unlock it, half of the maps are still locked, so even if you play on them it won't count.
Same with Skill Kill, unlocked at 35 but still half of them are locked. Skill kill like 'vengeance', easy thing you do from the beginning yet you won't get the extra xp because it's locked. We need a lot of xp to Reboot 5 times.
IMO, everything should be unlocked from the beginning, specially Skill Assessment and game types. It's already hard enough to find a game for Extraction or Assault without having to wait for the low level to catch up. Sometimes it feels like there's only 20 people playing the game, 12 in crash site and the other 8 scattered across the other game modes.
What do you think ?