Completing a strategy game in less than 10 hours is some kind of mistake.
But then again, Starcraft, Warcraft 3 and Starcraft 2 feel more like action games for me than strategy games, even in terms of real-time ones. Just like Diablo 1&2 aren't cRPG games.
They maintain the facade, but nothing else. Baldur's Gate 2 is far more like a strategy game than Blizzard products.
I liked Starcraft as a teenager, but nowdays I can't play it. Not because of graphics, sound or music (wich has great OST, game-wise), but because it bores me now. I liked the story to wich game mechanics worked fine, but playing it today, for me at least, it's tedious.
In terms of space strategy or RTS games I still love playing Homeworld 1&2 and Master of Orion II. Old games, but with outstanding replay value, that are very challenging to this day.