As Ricky said, the 3 GCD is started once you select a WS. For most WS's the animation exceeds the 3sec GCD. So you wont really be waiting to do another WS after performing one before. As for spamming WS's, in the current version if you build up 3000TP then do all you combos its basically the same as 2.0, except now we dont have to wait for 3000TP and can start our DDing right out of the gate. The only difference now is that there are no long cool downs for certain WS's.