I fail to understand your logic. How does that give them any more time to make the product better? If you release NCAA 2012 in July, and NCAA 2013 in July... that's a 12 month window to work with. If you release NCAA 2012 in August and NCAA 2013 in August... that's a 12 month window to work with. Changing the release date does nothing except give you an extra month for ONE release of the franchise. What would it fix the following year?
Now, as to your point that the release date should be closer to the start of the season, that I agree with. But as far as it making it easier to fix bugs, that literally makes ZERO sense.