For building a character. Goes back to the idea that pools (origin or otherwise) need to NOT suck compared to other primary/secondary powers or other pool powers. They don't need to be overpowered (and surely not equal to every primary/sec power), but if I look at them, and look at another power, then look back at the origin/pool power and go "nahhhh" SOME improvement IS needed.
EDIT:
The more we have good powers across the pri/secs, pool, epic pools, and origin pools the more we have to make hard choices for builds. That leads to MORE build diversity, not less.