I was against it previously, but I have to say that the more time goes on I am starting to think that a Rally-2 (or some variation of) based car is the way forward for the WRC.
Motorsport globally is generally moving to more economical rule sets, and rallying is going the other way (despite what Matton is arguing). Even F1 with all the with all its global reach has realised it needs to get hold of budgets, WEC, DTM, all too expensive to continue to exist as they were.
Rally does have a head start in that lots of Rally-2 cars already exist from multiple brands so it can react quite quickly, and the possibility of very healthy entry lists is surely a formality.
Skoda, Citroen, Ford, Hyundai, VW and hopefully Toyota could all enter factory, or factory supported private teams (Red Bull BRR VW?) almost straight away, plus any genuine good privateers. Already sounds good to me.