I have always loved the books, but I was very underwhelmed by the films.
I don't know what was missing from them, but something certainly was. I thought the boy who played Edmund, and the girl who played Lucy were good, but the script wasn't, and the two older children weren't very good, imo. Aslan didn't impress me much, either.
The Voyage of The Dawn Treader was always my favourite, as a child, but they'd altered it for the screen, and not for the better.
I do think they should follow the sequence, though, and do The Silver Chair next, if they are going to do anything at all.