I can honestly say I have no complaints with Revenant's graphics. Characters animations are superb. The backgrounds diverse, quite colorful, and nicely detailed. The spell effects are excellent, and make use of some exceptional lighting. Revenant will rarely leave you without something to see.
Sound is exceptional as well.
Voice acting is generally quite good, and consistent with each character. Sound effects really shine. Battles are almost more vivid to listen to then look at. Creatures snarl and stomp with exceptional tone, and spells rumble like thunder. Let's just say there's as much to listen to when you're losing as when you're winning.