It's the beginning of having a separate FOH and monitor mixer. Some pages back, I put up a diagram showing my setup with two Dante carded mixers. Basically all the channels of 1 are routed to the other, PRE DSP. This means I can run completely different processing per channel for FOH and Monitors. EQing the kick and bass for your inears this way is perfect... because as you have experienced, the EQ for FOH, especially if running subs, if far from ideal for your inears... and can sound a little weedy. The EQ on the Aux output can help... but it's compromise. You just have to watch what your mixers are doing Pre and Post fader, and Pre and Post DSP. Very cool trick and it's certainly helped some folk out along the way who were struggling with their inear sound and the bass sounding not quite how they wanted.