Aside from the subject matter I was not prepared for the size of the work. It is one thing to see on a monitor or handheld screen, and quite another to see it full-scale. It is a qualitative change, not merely a quantitative one. So while this high fidelity picture allows one to study technique, color, and changes he made while painting, I think it misses the point. I say this without having read much commentary or critique of the work, but I imagine Picasso was so overwhelmed by Guernica that he wanted any viewer to overwhelmed, too. So if they do move it, I hope it is in a similar setting - in a moderately sized room, on a wall not much larger than the work itself, inescapable.
As ridiculous as it may sound, if you plan on visiting, plan two outings: one for Guernica, and one for the rest of the museum. That room and work are emotionally exhausting, and at least for my wife and I the intensity of that wing required a cooldown period.