I have an idea what if every class have more than 2 cool down abilities for example A warlock can shoot projectiles just like the wizard or a beem just like the ogre. Hunters can place traps or turrets and finally Titans can throw enemy's or lift huge objects and throw them. I know my ideas are not the best but just think of the possibilities every RPG or MMO game use this method for their classes why not destiny. It's just an idea. Sorry for my bad English