This may be Plugin API and HOST dependent - dunno but if theres any way to add the ability to drag from the sides of the window instead of just a resize-corner at the bottom right that would be really helpful.
I find often that the plugin window has become even bigger than the screen on my laptop and have problems resizing it to fit the screen.
This happens for example when I have Scaler as a template or present in Ableton and have just switched from using the same project on a big widescreen monitor to my laptop.