Well, some of the Act 3 fights in DA2 could get pretty tough. You had to utilize the game's
"cross-class combo" mechanic to be able to beat them easily, and mages weren't as OP as in DA:O.
Of course, to get to those fights you had to survive the boredom of the first two acts - not an easy task.
I would say that there was some kind of strange hybrid arcade-action/tactical RTwP system hiding under the surface there, underneath all the trash mobs and spastic animations, but even if they'd polished it, it was nothing anybody had ever asked for.