Great
At first I was confused by the lack of arrows and the card system but now that I've beaten one campaign and have gotten used to it the new system I must say its really great.
The graphics a good and so is the sound even though the music gets a bit repetitive. In the later missions battles can get really epic and that is a great aspect of theis game especially when the enemy has 80 units and you only have 40 but you still manage to win thanks to the phoenix spell.
The only problemis that once you start a new campaign from "New Game Plus" you keep all your upgrades but not all your mana which means you cant equip all your spells or units. It balances out the game but it is a bit frustrating.
My suggestions for EW4 are to continue working on graphics and sound and to add more variety to the heros (they all look the same). Also an option for your new units to automatically advance forwards would be nice.
Great game 10/10