I think it would be really cool to have a small button that we could click within plug-ins to show a graph of what our input signal looks like. It would be awesome to have a set up similar to PAZ Analyzer where we could see metering, phase, correlation, and a frequency response graph. Add sidechain filters as well if the Plugin uses it.
Bonus points if you call it IMG.
The button would be small and discrete. Like the resizing one.