I'm not sure what this has to do with anything?
The released version of Madden 2006 was not broken, regardless of quality and regardless how tight the window between having a fully stable build and a gold master. NBA Elite was never released after a broken demo. Madden 2006 never saw a demo, much less a broken one. I'm not sure what else there is to say.
Having unstable builds in-dev happens. I've experienced it first hand; particularly under compressed time schedules, things have a way of breaking in new ways at the worst possible times. Making video games is hard. In-dev instability is not something that should be held against a developer so long as whatever is released to the public is stable.