I really like in debugging the fact you can hover a variable and see its value in a pop-up dialog. Unfortunately when the value is a long or multi-line string you can not see it all. Visual Studio's answer was to offer a right click on the dialog value shown with the option to choose a "text visualizer", which much better deals with longer textual data. I think even if the B4A IDE offered the one value display dialog to be sizable rather than fixed, it would help tremendously.
My suggestion is that the debugger's hover dialog be sizable rather than fixed.