Starcraft: Broodwar was, in fact, superfluous. Dark templar, Dark archons, and other Broodwar units were as balanced as they are in broodwar. All broodwar really did was enable those units, and new terrain types/new triggers.
Then they released it under the pretence of new content.
Also when I said "Last playable version of Starcraft", I was referring to the last playable beta. It's gameplay was a lot quicker, smoother. Attacks had more appealing graphics and sound effects.
Even the templar merging animation was a lot better. Then they butchered it.