They did that for the first 2 seasons pretty much. You may not recall, but at the end of that season many people, including the show runners but also people around the net and several here at SimHQ, felt the show was getting stale.
"Wander around, stumble into/get found by Cylons, fight, escape, rinse, repeat" was the mantra and people were tired of it. Then came New Caprica and things were shook up, but they really couldn't go right back to that formula afterwards. Instead they started focusing on the Cylons and how they differed from the colonists, and naturally the whole poly/monotheistic divide came to the forefront.
I don't doubt they could make another series focused on just combat good for 2 seasons. I do question it could last much beyond that if they don't change it up, though.
The Jedi Master
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Back off, man. I'm a scientist.