A dedicated hi pass and low pass filter would be great.
It is vital for hi-gain sounds.
It could be added to the cab block like the AxeFx II does.
This way it frees up X and MOD slots.
This would be really great, I just started using the WLPF after the cab.
It works well in controlling the high end the way I like it, having it in the Cabinet section would be really cool!