This. A million times THIS. And even if the problem is related to a graphic thing... Better to get it sorted before releasing it... Would you imagine all the complaints otherwise? 100% better waiting for the known issues to be ironed out before releasing, than releasing something with issues. The same people who now ask for an explanation (once again, LOL) or complain because it hasn't been released in January would most likely complain about it being broken if it got released with, say, a wrong texture on Milan's third kit.