Havoc rotation for some reason shows an icon for... Demon Blades - a passive talent. Why???

-- Manually added: Demon's Bite/Demon Blades if in melee range if Target:IsInMeleeRange(5) and (S.DemonsBite:IsCastable() or S.DemonBlades:IsAvailable()) then if Cast(S.DemonsBite, nil, nil, not Target:IsInMeleeRange(5)) then return "demons_bite or demon_blades precombat 4"; end end

How should I know this is an icon that tells me that I need to attack, tho? I mean, I didn't see that for any other rotation. Usually "attack it with auto-attack" is a pooling icon, isn't it?

When you see that icon, you should attack your target. There is no other icon to show at that point. Showing no icon usually indicates a problem with the addon, so that's not preferred. I fail to see how the Pooling icon would be preferred over an icon that effectively tells you to attack your target.

Because it's the end of the Precombat chain, so the alternative was no icon at all.

Because it's the end of the Precombat chain, so the alternative was no icon at all.

I don't get it... What's the purpose to show an icon for a passive skill... What should I do when I see it? Maybe something like pooling would be more meaningful?

The Pooling icon denotes that there is no action to take.