Myrtana vs Nordmar/Varant

I have finished every city in Myrtana except Faring, at least up to the point where I have the "Liberate" quest in each one of them.

For thoose who are further than me, I'd like to ask how large, in content, Nordmar and Varant is compared to Myrtana. It seems to be less cities there, but the size of at least Varant is larger than Myrtana. Makes me wonder if I am 1/3 through the game by now…