I'm Spanish, and I can tell you that filming in Spain is extremly cheap. I lived in Tarragona for two years. My uncle was the TV critic of the most important Catalan newspaper. He told me many times that the relative "poor" quality of the average Spanish film was a result of using low budgets
Karsi was the closest thing we got to Val, and she was killed off within 15 minute of screentime. That was a shame, she was amazing. The popular reaction going on the Internet really shows she was a fan favorite.
I don't think we'll get Val. It doesn't fit the narrative now. Maybe Jon will go North and meet a new wildling girl, but I doubt it. D&D probably had planned for Jon and Dany to meet this season.