While stating that I love Movement, I would not call it their most creative endeavor, certainly after Closer. The only additional creativity was a further step with electronics. Of course, writing the lyrics for the first time was a new step.
The real creative peak was the mid 1981 through mid 1984 time span--Temptation, Hurt, 586, Leave Me Alone, Blue Monday through The Perfect Kiss. Most of these songs were developed live (do they ever practice) the climax was the weekly tweaking of TPK (see Geri). Many of the Low-Life tunes were played live before they hit the studio.
After Low-Life things went to hell IMHO. While As it i when It Was and BLT are awesome most of the Brotherhood work is not a resounding step forward. Their subsequent hiatus that produced Technique, however much better than Brotherhood and much more refined than Low-life, was really the last great creative peak but not even close to the leaps they made in 81-84. So they got better equipment and Barney could finally sing. Nothing groundbreaking.
I am not going to touch Republic or Get Ready except to say that perhaps Get Ready is closer to Movement than anything else they did. Created after a break up and reformation, a struggle for a new sound, emphasis on guitar and jamming.