So maybe it won't be that much better than the GR9 in the AD role for a while.
But the F35
will have a radar, and hopefully link 16/22, so perhaps a better comparison would be with the AV8B+, or the dear old
Sea Harrier?
Since the new carriers are likely to be delayed from the intended dates of 2012 and 2015 for entering service, this may not be as big an issue as it might appear.