[kalthalior]

I'd say V is well worth buying, and I play exclusively solo as well.

I've yet to go back to play SEIV since I bought V, although I probably will do so at some point - just like I went back to play III after I spent 18 months playing IV.

The UI takes some getting used to, but having gone through the transistion from III to IV, I was prepared to grit my teeth and simply work through it.