And also, a while ago I've suggested to add a option to switch any style to double time or half time. So one bar can be played as two bars or vice versa.
This could be useful to save space on a chart. Most up tempo tunes are usually written in cut time (2/2), but it could save space to write it in common time (4/4). An other option would be to have a 8/8 meter available to double the tempo.