[yt-dev] Why does ProjectionPlot not take and pass **kwargs

Hi all, I am wondering why ProjectionPlot (and others) do not take all the keyword arguments and pass them to PWViewerMPL and PlotWindow. For example, currently there is no way to set buff_size at the creation of a plot. One has to call .set_buff_size after the plot was created. I am thinking about leaving only the arguments specific to ProjectionPlot explicitly, and use **kwargs to pass all other arguments to PlotWindow. But if there are reasons not to do this, please let me know. Thanks! Yi-Hao