Were still not getting a good deal, because once the pound is strong/normal again
What gives you the idea that the pound will become 'normal' again - it may well be that this IS normal now.
If you know anything about economics, when the economy recovers so will the pound, we may not see the dizzy heights of almost $2 or 1.5e euros to the £ like we saw in the past, but it will get stronger as the economy does.
It's a fair question to ask though, and what you have now made me think about is when it does recover, will VW pass on the savings..... I very much doubt it.