Shizuka seems a lot weaker in comparison to Mio now. I think being taller and having the long hair gave her a certain look, it always felt like she was a big above Mio. But that last image, she really looks like a kid in a sense, she has lost her aura of maturity or sophistication. I think that was a very well lined up image, very purposeful. Part of it is perspective, since Mio is placed between the viewer and Shizuka, this making her seem taller (still shorter than Shizuka but less obviously so), part of it is the crutches, part of it is the hair - Shizuka always came across to me as a bit of a Ojou-sama type, but with short hair her image is very different.
That is a seriously well done composition that really makes the chapter.
I hope this ends well. I like Shizuka, and she's always been a bit of a flawed vase. I think Mio is much better beside her at a more equal level, but Mio idolized her too much in the beginning. Now the tables are turned.