Analysis Workspace- Legends

1). The Legends are not customizable, and so become very long when using metrics with stacking of dimensions in the columns. Example, I have Channel = Social, with another stacked Dimension like Referrer = facebook, and then a third dimension tracking code= sc_fb_mycampaign. I have day in the rows, and Visits as the metri cs. When I create a line chart, it shows the legend as "[Visits] Channelocial[referrer:facebook][tracking code:sc_fb_mycampaign]. Should have ability to rename the legends

2). Position of Legend, and ability to assing colors. (This will help users to know that green is always Organic search. )