This time around you can enjoy:
1. Winter Alter Ego Extravaganza (the good set of twice-per-year trusts).
2. Adventurer Gratitude Campaign (Weekly logins for free stuff including Kupofried trust)
3. Login Campaign with lots of stuff including the login trusts set, an outfit, furnishing, and mount. No waifu statue though.
4. Starlight Celebration (A ton of stuff to do here. Outfits, furnishings, foods)!!!
5. Dragon Quest crossover event. Rare AF.
6. Nomad Mog Bonanza for us to not win.
7. Two AMAN Trove vouchers daily.
8. Free-to-play for 19~ days. (Maybe longer by a day depending on when they flip the switch to turn it on/off).
9. Discount Campaign for all of your server hopping needs.
10. Exp Boost Campaign. (It could just be this and I'd be happy).
11. Delve (Plasm) Campaign.
12. Surge Walk of Echos Campaign. Logwatch 2.0 drops mostly unless you get lucky, but sometimes good stuff and it all NPCs for $.
13. Alter Ego Buff Campaign (but not the Plus one where they get Reraise).
14. Voidwatch lights to max campaign. Get that bread!
15. Six Daily Dark Matter freebie augments. Get those random augments!
16. Abjuration Dial for all of your inventory - needs.
17. Combat/Magic skill up Boost Campaign. Not the crafting one though. Boo! Boo, I say!
18. The Voracious Resurgence goodies including more missions, a furnishing, a pot leaf lockstyle, and a... cape.
19. No more exp loss in Trove. Goes great with Silver Voucher campaign.
20. Ambuscade purchase limits eased on some things.
21. Some monsters moved due to them being placed in areas that complicated poor Ob's spawn location.
22. At least some effort towards curbing RMT (more of a placebo though).
23. At least 12 "resolved issues" bug fixes noted (which aren't impressive, but are something that took time).
Edit:
Note that not all of these campaigns have activated just yet with the version update but will be rolled out over the span of the upcoming week or so per announcements already released as well as announcements in the monthly update FFXI Digest and Freshly Picked videos. Sorry for any confusion.