Adult Warren was in control of his Archangel form when he visited the Sleeper mutants with teen Angel in X-Men Blue. I want to say that happened in issue #35. There were no multiple psyche problems in that story.
It's just kind of hard to figure out what Warren's personality status is because we don't definitely know where all of his appearances take place time line wise. X definitely fixed Warren's mind in Soule's run on Astonishing. Then the Astonishing annual shows Warren having multiple psyches in his head, despite the fact that the annual takes place after X fixes his mind. And then Warren's appearance as an in control Archangel in Blue is published after the Astonishing annual. So I'm just going to guess that X definitely fixed Warren's mind in the annual, and then he appears in control of himself in Blue.
And really, the multiple personality problems may just be a moot point, if Nate fixes Warren's mind when he joins his Horseman of Salvation. Assuming that these are the 616 characters.