Not bad for organ, good for Clav, not even too bad for Wurli, WAY too light for Rhodes and acoustic piano, IMO.
But my worries about 73's goes more to the fact that it only goes down to C, whereas any decent bassline needs a low E. so you end up having a VERY low C and you have to split at least a third higher up to give you a decent range for the bass. Mind you, Electro STILL doesn't split, so I guess you are good to go. But you'll notice on the Stage line they offer 73, 76 AND 88.
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An arranger is just a tool. What matters is what you build with it..!