No, I didn't feel any sympathy for her. Some of that was because the game seemed confused about her. I couldn't understand why, with her powers, she didn't just go straight to somewhere she knew, like Kaer Morhen, or tell Triss who she was when she arranged to meet her. On the one hand she was caring (e.g. Skjall) and on the other just did silly things to advance the plot. However, my feelings may be influenced by the fact that I really didn't enjoy playing as Ciri, either her style or having my "being Geralt" immersion broken. I only wanted to know what Geralt knew, and that could have been accomplished by short cutscenes/art scenes. Knowing how OP Ciri was, I couldn't really worry about her, either.
Don't understand the appeal of Ciri as a protagonist for a fourth game, either. The end of 3 - whichever one you get - makes her future pretty clear, and there's no great story potential in any of them. You'd also have to destroy some people's chosen game endings.
(should probably add, only read a couple of books, Ciri seemed pretty bratty, but then that's kids for you - with or without super powers..)