What about those old EuroRX track, in Hungary (Nyirad) and Austria (Greinbach)? Those tracks were pretty great. I always enjoyed Kouvola (Fin) track too.
They used to race too in Netherland, Poland, Czech...
The RallyCross Challenge Europe (RCE) races on those tracks and its cool too. More amateur, but still..
Italy and Lithuania too!
Estonian RX tracks are interesting too.. but not for the WorldRX series.
The Scandinavian championship (RallyX Nordic / RallyX OnIce) also have cool track, but not WRX level