Thoughts on this emerald?

[Ibrakeforpossums]

While I will never have Karl's eye for cut and crystal, it may help why I (a novice) would reject those 3 ECs. As they rotate into the face-up position - as you would see it on your hand - they all flat-spot, like a car tire that's been parked too long. As it rotates you want each facet to turn on and off, to ripple and "dance" (Karl's phrase) across the table. Lively, not static.
Be patient with yourself, they'll make more on which to train your eye.