TheTrueZoltan!
Inspired
One thing I would like to see is a loudness equalization of the different impedance curves. Some of them (like the Recto Large) are louder than most others, and that makes it much more difficult to compare the actual frequency response. For example, when I select the Recto Large curve, I always have the feeling that everything sounds totally hyped. But when I then adjust the overall volume in the amp block, I realize that the difference to other curves is much more subtle. So it would make it much easier to compare the curves directly if there were an impedance curve loudness equalization function.