I completly agree with you.
I think that the problem is that due to the almost 30% stake that Porsche owns in VAG, I don't think they will develop a car to compete against Audi whilst the deisel regulations are favorable. Unfortunately, I think that board room politics has determined that Porsche will not go into P1 with a petrol engine until Audi has no chance of winning it (due to less favourable diesel rules).
As you can tell I am a rabid Porsche supporter, but I don't agree with this strategy (if its true). This might make sense from a manufacturers group point of view, but it really does nothing for Porsche's racing image.