Has endgame structure changed?

[Senliten]

I haven't been keeping up, is that an alternative to tome farm before say raiding. Are there other activities?

Going by the old tomes being converting into poe, I doubt it.
Just gotta hit 70 > unlock new 70 roulette > roulette's that had tomes previously, but now have xp, should now have tomes again > farm said tomes just like the previous methods in HW
The preliminary patch notes also show fragments of this too. Dead give away will be the PoTD changes, where you won't get the new tome stones until 70. Same thing occurred if you weren't 60 for lore, you'd just get poetics until 60, then start racking up lore/scrip.