How are you dealing with issue #9?

"9) Harmony generation / playing keyboard. (In normal, not manual mode) Early impressions are NOT good. If I'm playing the most basic of chords...(I mean basic - Root, 3rd, 5th) then it works nicely. Introduce a 7th, or god forbid a 9th and it goes sideways...fast."

Do you ONLY play basic triads?
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An arranger is just a tool. What matters is what you build with it..!