I think Richard should play Rotterdam, at least be on the entry list. Even though he hasn't had success there.
I think he's often flat there after Montpellier. It doesn't make sense to me to leave France between Montpellier and Marseille, if he's playing there again. But he keeps scheduling Rotterdam so you might get your wish, ImmzB
Barcelona, London/Halle, Beijing/Tokyo and Basel however could be his 4 ATP 500's for 2015.
He could add a 5th 500 tournament which could be Rotterdam.
I would like him to play Barcelona, Halle, Washington, Beijing, and Valencia. He seems to prefer Halle to Queens, Tokyo seems too quick/ humid for him and Valencia is slower than Basel.