I think the thing is... the OT keys just don't really make sense to me. I mean, at least with the original set of character keys, they were characters that were part of the Clone Wars show, and they represented the look and style of the show. Even the new Yoda key from the animated series, looks like Yoda from that show.
But... keys like Tarkin, Vader, Boba, Han... they just don't really look like anything else, and these characters have never appeared in that form... so I just don't like them as much. The CW stuff I can't get enough of, and I wish they would go back and continue making keys to represent the characters from the new CW show.