Trample and Double Strike

I think you got it: once the opposiing creature has been killed, the second strike of the attacking creature is not dealt/trampling over the opponent’s face.

That might be a design choice but it’s inconsistent with paper MtG.

First strike: Creature hits first, enemy only retaliates if survived, otherwise combat turn over.
Double strike: FS+ normal (simultaneous) strike. Since it has a built-in FS, if the enemy creature dies, the ‘combat turn over’ condition kicks in.

It makes sense in this way, why write another algorythm exclusively for DS, when FS+norm strike can cover it?

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Hey said precisely why in the all of two sentences comprising his post. Not sure if trolling or … .