i've just tried the current firmware with it's LFC feature through my dual 4x12 rig - YES you can definately feel the difference.
I've just tried my go-to Marshall DSL100 profiles and it's noticeable at the first palm mute.
UNBELIEVABLE - that's the bass response I was missing sometimes.
I used to compensate this with a studio EQ (X Slot) boosting 1-3 dB with the low filter starting at 100-130 Hz - but these EQ settings are finally obselete.
THANKS TO THE KEMPER TEAM!