I was looking at some arrangements lately and realized that some of them are not using time signature correctly. For example, on k-Night's arrangement of the DQ9 Overture, there should be a pickup bar of 1 beat before the fast section comes it, if you can thing of it. That pickup bar is not included, which makes reading very difficult. As a rule to arrangements, I think that time signature should be used with more emphasis. Time signatures do not merely provide an open field in which to put notes, but they define strong beats as well.