Just because some of 'the big boys' have put up a couple of 'test aircraft', it doesn't mean that every European government is going to suddenly relax its no-fly areas 'toute de suite'.
"Oh well that's OK then, what WERE we worrying about?"
Cash-wise, everyone's screwed.
Eurocontrol's comments will be taken into consideration while individual governments conduct their own tests and, only then, make a decision.
... which will NOT be 'toute de suite'.