Well if you've played long enough...
- 8.0: 8 dungeons, 3 trials, 2 extremes, MSQ, pvp series, 6 new zones, new hunts, new FATEs, new role quests
- 8.01: 4 normal raids
- 8.05: 4 savage raids and associated tomestones/crafted gear
- 8.08: Job Adjustments
- 8.1: 1 extreme, 1 unreal, 1 dungeon, 1 exploratory area (this varies a bit), master role quest, mentor cert period ends, Job Adjustments
- 8.11: Job Adjustments, 1 ultimate, pvp changes
- 8.15: 1 chaotic?, hildibrand, custom delivery, beast tribe
- 8.18: savage restrictions removed, alliance raid coin can be used to upgrade tomestone weapon, pvp changes
- 8.2: 4 normal/savage raids and associated tomestones/crafted gear, MSQ, 1 dungeon, 1 trial, 1 extreme, 1 unreal, job changes, pvp changes, new pvp series
- 8.21: any emergency job changes
- 8.25: Hildibrand, beast tribe, 1 variant/criterion, new relics/field operation
- 8.28: Job Changes, pvp changes
- 8.3: MSQ, 1 dungeon, 1 trial, 1 extreme trial, 1 unreal, 1 alliance raid, new map, exploratory area update, job changes, pvp changes, new pvp series, new custom delivery, random QoL we've wanted for 12 years
- 8.31: 1 new ultimate
- 8.35: Hildibrand, deep dungeon, beast tribe, relics
- 8.38: savage unlock, purchase tomestone weapon upgrade with alliance coin, pvp changes
- 8.4: MSQ, 1 dungeon, 1 trial, 1 extreme trial, 1 unreal, 4 savage/normal raids and associated tomestones/crafted gear, job changes, new pvp series, frontline adjustments, ocean fishing route
- 8.41: add echo to 8.2's savage (I don't report all the echo's they add, but assume they add it to anything once it's not the latest version of the duty type)
- 8.45: Hildibrand, 1 variant/criterion, blue mage update, relics
- 8.48: pvp update
- 8.5: MSQ, 1 dungeon, 1 trial, 1 extreme trial, 1 unreal, 1 alliance raid, job changes, new pvp series
- 8.51: crafter relics, new variant/criterion, pvp changes
- 8.55: MSQ, hildibrand, final relic upgrade, allied tribal quest, misc trial often used at fanfests, pvp changes, frontline changes
- 8.57: savage unlock, alliance raid coin can now be spent on tomestone weapon augment, any pvp fixes, weekly tomestone cap doubled
- 8.58: everything completely unlocked and non-weekly. pvp changes.
I didn't include all the little things (housing items added every major patch etc but if you like those, can expect all that at the intervals you're used to).
I predicted most stuff that's in prior expansions because of how consistent this is. Even right down to which patches have minor pvp changes or a new gold saucer GATE added...