and the expensive developement needed to make the Typhoon a naval plane would be payed largerly to BAE - improving the chances to export these to india etc...
If you want to get something done ... do it yourself.
And I agree that navalization would present a formidable barrier to deployment of Typhoon aboard CATOBAR-equipped carriers, a barrier Rafale, the F-35, and the F/A-18 series have already overcome.