Something needs to be done about the empty open world

[ItMe]

Since when? FATES have terrible XP efficiency. As do sidequests.

While we're at it, the only actual efficient XP activities in this game are instanced.

They can be a little underwhelming sometimes, but they can be very valuable to the DPS sitting in que ; )

But OP is that all you're asking for?
Some non-instanced ways to efficiently power level?