Another nice recent discovery is the ability to adjust the level of every channel independently.
I recently went active with the front stage after installing a new JL 300/V2 amplifier and the autotune became really finicky with the position of the mic trying to autotone all 8 channels. The final stage image would shift significantly right or left with just a slight shift in the microphone position- literally a matter of an inch or two to the right or left.

After about 5 tuning cycles I finally settled on one but it was not as good as when the front stage was passive.

The independent level control allowed me to fine tune the autotune results to balance the image.

I'm guessing you could improve the image even more by fine tuning the TA settings but I am hesitant to try it.