I got a second monitor for my DAW recently, and for what it's worth, I just gave X1 another whirl, and if you undock the multidock and drag it to the second monitor, a lot of my discomfort goes away.
Different strokes for different folks, but in my opinion, the multidock only makes sense in a multi-monitor situation.
I wonder if that's why they named it "multi (monitor) dock".
Now, if only they could fix the smart tool; and give us back the SONAR 8.5 style piano roll edit mode; and distinguish pan/vol/gain by colour; and give us an "all" mode for the edit filter...