When I let(which is very rare) anyone play the MK I get the same reaction as you oggy, mainly because their own basses have the action at mount everest levels and do not understand the subtleties of low pass filters - they assume them to be treble & bass boost/cut controls.
It took me 6 months of playing and experimenting with the controls as well as the pre gains on the pre amps to get the type of sounds I want.
Without dissing anyone, if you have played a passive bass and then jump to an active one whether it be an Alembic or some other make, you need to take time to understand the controls and what they do as opposed to 'it's just like a P bass but with more knobs!'