That's very cute and all but I'm not sure I can 100% get behind the '' change everything about you to fit what your crush wants'' message
One-shots is just one of those ways to get attention from publishers, they're not meant to be short stories with a 'message'.
In any case, Suzu doesn't really know what she wants which is made apparent to readers every time Kasumi's thoughts are shown during the living room scene and while Kasumi was checking out her profile's preferences. Kasumi opted to cut her hair and wear clothes she thinks would make her look mature, but this doesn't really change her, personality-wise (people always try to look their best if they're trying to impress the people they are interested in all the time so I don't get the fuss from other comments; also clothes and hairstyles have no gender just in case that's what people are thinking). As for her true intention that lead up to that meeting, she most likely want to catch Suzu's immediate attention and then for her to realize that someone has 'always been there for her' (Suzu's reply to Kasumi's question earlier on) regardless of the preferences that she listed on her profile, hence why Kasumi was never really worried about revealing herself and confronting her during that meeting. Kasumi wanted to see Suzu's realization after all.