Last night my Adventurers League group deviated from the season 5 story arc to visit a Tier 2 module from season 1. The biggest driver was that there was not enough content published in season 5 to get everyone into Tier 3 unless they made every session AND used dowtime to level up. So we agreed to run a two sequencing modules out of season 1 in order to get everyone the ability to hit Tier 3.