A lot of The Veilguard’s systems seem to draw heavily from Mass Effect, and that includes a spin on Andromeda’s ability loadouts. Since you can’t access all your abilities on a wheel like you used to, The Veilguard has you decide on what attacks you’ll have at your disposal on a given quest and assign them. The showcase had a warrior version of protagonist Rook kitted out with a “This Is Sparta”-style kick, a grappling spear used to draw enemies in close, and a shield-like aura to protect her from damage. They definitely seem to be going for a tanky, brawler build, and picking the abilities best for whatever approach you’re going for will be key to defining your playstyle.
Also in the loadout is an Ultimate ability called Warden’s Fire, which rains down an area-of-effect attack on enemies. It sounds like this might be exclusive to Grey Warden Rooks, one of the origins you can select for your hero in the character creator at the beginning of the game.