They dont nerf because something is overused, or buff when underused (ie based on % of player use). They adjust based on ttk and weapon meta, a perfectly balanced gun meta and still everyone might use mida does not initiate a nerf. Now, here is a question, why do so many use mida? over other scouts, over other weapon classes? this is cause for concern as it MAY indicate either a fad (ok) but it might also indicate that it is OP and need a nerf.