Lack of content each patch? Am I playing the same game as you?
Let's have a look at what each major patch gave in terms of content:
2.1
1. Main Scenario Quests
2. PRIMAL: Good King Moggle Mog HM
3. PRIMAL: Ultima HM
4. EXTREME PRIMAL: Ifrit, Garuda, Titan
5. Hildibrand Questline
6. NEW DUNGEONS: PS, Haukke Manor HM and Copperbell HM
7. CRYSTAL TOWER - Labyrinth of the Ancients
8. BEAST TRIBE QUESTS - Sylph and Amalj'aa
9. PVP: Wolves' Den
10. Treasure Hunts
11. HOUSING: Free Company Housing
12. Aesthetician
13. Crafting Recipes
2.2
1. Main Scenario Quests
2. PRIMAL: Leviathan HM
3. EXTREME PRIMAL: Leviathan and Good King Moggle Mog
4. Hildibrand Questline
5. The Second Coil of Bahamut
6. New Dungeons: Amdapor City, Brayflox HM, Halatali HM
7. BEAST TRIBE QUESTS: Kobold and Sahagin
8. RELIC: Atma and Animus
9. HOUSING: Gardening
10. Challenge Log
11. Aesthetician: New Hairstyles
12. Crafting Recipes including 3-star Recipes
13. New Gathering locations and items include big fish
14. Glamours implemented
15. Retainer Ventures
2.3
1. Main Scenario Quests
2. Crystal Tower - Syrcus Tower
3. PRIMAL: Ramuh
4. EXTREME PRIMAL: Ramuh
5. Hildibrand Questline
6. Delivery Moogle Quests
7. Second Coil of Bahamut - Savage Mode
8. Greatest Story Never Told
9. New Dungeons: Soulbreaker Isle, Tam Tara HM, Stone Vigil HM
10. PVP: Frontlines
11. Hunts
12. Treasure Hunt: Unhidden Maps
13. Housing: Private Chambers and Chocobo Raising
14. Aesthetician new hairstyles
15. Crafting: New Recipes
16. Desynthesis
2.4
1. Main Scenario Quesets
2. PRIMAL: Shiva and Ultros & Typhoon
3. EXTREME PRIMAL: Shiva
4. The Final Coil of Bahamut
5. New Class and Job: Rogue and Ninja
6. Hildibrand Questline
7. Delivery Moogle: More quests
8. New Dungeons: Sastasha HM, Snowcloak, Qarn HM
9. Housing: Extra subdivisions and Culinarian furnishings
10. Aesthetician new hairstyles
11. PVP: New gears
12. Crafting: new recipes and 4-star recipes
13. New gathering spots and items
14. Retainer Ventures - new rank
There are a lot more I did not add in, such as fixes to skills, 2.xx patches (such as Ixali beast tribes), new items in ventures and treasure hunts, relic questlines etc. They've consistently put out similar amounts of content in each patch, and it ain't a small amount.