because there are presets like “mix bus saver” which do not save a dang thing if it is not dynamic…
(it just pushes and cuts random frequencies without knowing how the source is…)
sooo, for “mix bus saver” to really be a mix bus saver, it needs to be dynamic… otherwise its obviously saves nothing… 
anywho… not really a request… just a “think about it”
take care=)