Changes at a glance that I think are important in no particular order:

• New MSQ, dungeon, and trial
• New Alliance Raid
• Combination mount from getting all the previous extreme trial mounts from EW
• New Island sanctuary stuff, including a new currency
• New Unreal raid (Singularity Reactor)
• All alliance raids now have causality and comedy tokens with the exception of the Crystal Tower series. Duty Roulette for Alliance raids also has increased rewards with the same exception.
• Duty Roulette alliance raid now has minimum Ilvl requirements depending on your class lvl.
• Some Crystalline Conflict HUD improvements
• Items purchased from store can now be armoire’d
• New custom deliveries
• Ways to improve comedy gear
• Aetherial Reduction QOL
• Minor potency buffs to PAL, RPR, BRD, and RDM