Yes they have had a poor season by their own high standards, but him leaving this summer, without a specific club to go to, is a bit of a shock, well to me it is anyway.
Him taking a year off, could well suit quite as few interested parties, as Arsenal might want a final goodbye season under Wenger, City (depending on if the are in the Champions League or not) seem intent on Pep, but could I suppose try for Klopp.
PSG I think could be in the frame as well, Blanc was never their first choice, and they certainly have the clout to try and get him.