Yes, this would be essential. Most of the competition has a simple cab filter already (like Strymon Big Sky and Empress Reverb), even a toggle option like that would be awesome but I know that Eventide is more into creating its own unique effects that are more out there so an IR loader with some added tweakability would be even more killer (HX stomp, as mentioned has it and now the new Poly Digit stuff.. etc.).
