I also like the color-coded currents, for empires like mine where the sprawl gets up there the amount of information gets hidden by the clutter- but it'll be useful for "at a glance" in a new game and adds visual interest to the galactic.
I was just suggesting it say 1 leg, 2 legs, 3 legs, 4 legs, or >4 legs- but it would be interesting to see the actual sprawl listed- regardless of any utility.
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kill the messenger.