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I hear you, you could add it to the wish list elsewhere on the forum.
Lots of things on that list seem to appear in the software a couple of revisions further down the line, Lake style output sections now there is a thought. As a temporary measure you could try using the HI and Low pass options in the Parametric section for each output to create simple band pass filters though you are limited to the slope of those filters which I believe is not great 6-10dB per octave possibly. I am sure with some care you could realise a simple crossover. You would of course have to create multiple versions of the outputs possibly in a matrix then group them together to give you left and right. Bit of a complex path but I am sure you could do it.