(Hi again! Long time no see)
As far as i know, the term "visu", meaning "a fan of Visual Kei", comes from German (Popcorn is a German mag and it has a Czech edition, too), where this type of abbreviating words occurs often, so it is probably not as weird for them as it is for us. However, the Czech edition adopted the term, although it is so odd and lolable to many people...
And yeah, agreed that the quality of music is a subjective thing and comparing bands in the "who is better" way is stupid.