IGN preview here:
They have the tactical view from DA:O back (and you can use it on all platforms), the action looks more like an action game in a lot of ways, and you can play as a Quanari. Sounds like there is a lot of freedom too (more overarching goals than moment to moment) and the world sounds huge. You capture keeps like you might capture bases in a game like Far Cry 3 and that allows your Inquisition group to grow. Also sounds like there may be more grey area choices, like Witcher or Walking Dead.
The game even has environmental destruction, which makes sense in Frostbite but I don't think I've seen an RPG with it before. Apparently you can use a fire spell or weapon to burn down wooden towers for example and that will send enemies in them falling to their deaths.