I am also very optimistic about the future of FF14. The following all have me excited:
1. Grand Company induction & Grand Company Levees
2. Primal content
3. Caravan escort -> Hamlet Defense
4. Beastman stronghold raids
5. Chocobos!!!!!!!!!!
6. Stat overhaul
7. Crafting simplification
8. Materia!!!!!
9. Jobs and the associated content

I am looking forward to post 1.21 too but damn if i'm not excited about 1.19-1.21 just as much.