There is the Ivalice 24 player raids.
There is Deltascape and Sigmascape
There is Eureka
There is Treasure maps/Lost Canals
There is Expert roulette
There are beast tribes you can do.
Ooor you can level another job, try crafting/gathering, buy a room and get into furnishing.
Even though you hit lvl 70 there is still a bit of MSQ left after the expansion. : )