For interrogating a waveform(s) at the mouse cursor, provide an option so that the channel values in the popup/tooltip correspond to the time being interrogated (ie at the X-axis location of the mouse), instead of the values at the actual mouse location. This would show both channel values at the in...

Add an option to put both vertical axes (ch. A & B) on one side of the display.

For me, having both axes on the same (left) side is easier to use and less error-prone, especially when the scales are different.