The plus point of Wembley not being available for the FA Cup Final is that the FA may not lose quite so much money on the whole project. Of course there is the issue of ticket sales which will yet again be flooding into the now-dated Millennium Stadium coffers, but let us peruse the small print. For every week Multiplex (don’t get a cinema in to do a builders job) is later the FA get 1 million quid compensation. Which means that as long as it is delayed fifteen years (completely possible at current work rate) it will be free!
The other plus point is that England can play a few more friendlies in actually friendly venues rather then the shed on the North Circular. Though clearly it might have been useful to get acclimatized to venues where no-one gives a shit what is going on and is all on a corporate jolly just before they get to Germany.