Cory is a effective villain. I like the fact that he isn't fleshed out as a character, he wants to be a god, has the capacity to do so and is willing to let the whole world burn if need be to get the job done. Some may find that simple, but to me, it works. If you had the power to be god, would you run around telling everyone the reason(s) why you should be god? Or would you just take it for yourself? (Operating from the shadows was a good tactic, no need to draw unwanted attention to yourself. Very Sith, I approve.)
I know people want him to have victories over the player, but what victories did Loghain have over the HoF? Meredith or the Arishok over Hawke? If Flemeth didn't rescue HoF, Ferelden would have been destroyed by the blight, due to Loghain and Cailan's idiocy. If Flemeth didn't rescue the Hawkes, well, all the Hawkes would have died and Cory would have been locked away forever, (unless I'm wrong, memory serves that only the blood of a Hawke can awaken him.) Perhaps this is why the Hawkes were saved, to awaken Cory for him to power the foci? who knows. It sure accelerated the Mage/Templar War, which led us to the events of Inquisition.
The only victory that matters to Cory is entering the Fade physically, which he would have been successful if 1) you didn't barge into the room and 2) have an old lady slap the foci out of his hand into yours. He basically got robbed in the purest sense of the word. This is a reoccuring theme, right about when he has victory, the Inquisitor comes in and sinks the game winning shot at the buzzer. (So in a sense, Cory is every basketball team that got beat by Michael Jordan's championship Bulls teams, that poor bastard.)
After Haven he doesn't need to hunt the Inquisition/Inquisitor personally, (he came for the anchor, after that plan fails, changes course.) he uses Grey Wardens, Templars, Mages, Seekers, and politics to slow the Inquisition down while he pushes forward. If not for Morrigan and her knowledge, he would have succeeded again. Unless Solas was holding out about the Arbor Wilds until the last possible moment.
(this is how this conversation should have gone down.)
Cory: There is no Maker, his seat was empty.
Dalish Inq: (nods) and your face is f*** ugly. Tell me something I don't know.
(Fight)