these 3 new events are actually amazing. i joined FO76 a few days before this update came out. it became level ~40 to ~100 in just a few days. when you participate in these events with higher level gamers, you get a ton of XP if you assist in killing an enemy + a ton of reputation points towards a specific faction.
Test Your Metal - no reputation points given, its a Brotherhood of Steel event. still grants a ton of XP and good equipment if you help fight the bots.
Eviction Notice - gives reputation towards The Settlers / The Foundation. it is kinda difficult due to the Super Mutants needing a ton of firepower to take down and needing Power Armor, as they can also deal tons of damage. Grants the best loot and good amounts of XP
Moonshine Jamboree - gives reputation towards The Raiders / The Crater. the most fun and best way to earn XP from public events. it is chaotic but spawns in tons of enemies to assist in killing, granting more XP than you'll ever see. the rewards are alright but the XP and Reputation are incredible
best part about these events is that they happen multiple times per day and its always packed. literally the best way to earn Rep & XP at the same time