rdnzl
Inspired
... all the mid and higher gain amps that I used to like a lot seem to have lost their clarity now and became quite muddy and boomy on the low end. I've tried dialing it out with the Global EQ ...
Global EQ and other post amp bass cut methods will do just that - cut bass, make it thinner, etc.
Cutting some bass before the amp means that there's less total gain in the bass freqs... i.e. tighter, clearer.
High gain amps compress the holy shitballs out of the signal and that compression will give you back the output level (fullness) of the bass frequencies even if you cut some going in.
Also - like others said: depth control.