This system exists in other games & you can burst dmg, but that would only be ideal for certain situations requiring burst damage, otherwise in majority of situations, especially PvE raid/Boss fights, highly ineffective dps to spam WS, besides unless poorly implimented, some skill will cost more than others. It will come down to thoughtful use of skills, hopefully... we'll see how it goes but if it's a samiliar system, if you think spamming WS will work, then you're gonna look very noob.