The Legacy SE crosses from the woofers to the 7" mid at 180 Hz.
Bi-amping without a crossover loses all the benefits of bi-amping. I.e. the additional 6dB additional headroom .
Baffle step compensation, impedance leveling, and frequency equalization are all lossy, passive functions attempting to fix basic design flaws already dealt with in the overall speaker design.
Biamp, but do it right - ask Legacy for their recommendation.