Lewis, alcoholism is progressive. It will get worse. It is getting worse. She can hide the drinking, but she can't hide the fallout.
You seem to want someone here to agree that you're doing the right thing by keeping your drunk wife and your sad, confused kids under the same roof because you're afraid of taking action. I personally can't do that. As long as you're minimizing the reality of your wife's situation -- and let's face it, her drinking habits are not normal, her drinking habits are not acceptable, and she is causing dozens of problems in your family's lives that are completely irrational and unnecessary -- nothing will change.
You want a sober wife. That's a totally reasonable desire. This woman may not be that wife. This woman is an alcoholic. You need to act on *that* information, not what you want, and not what you're afraid of.
Please protect your children by separating them from the consequences of her alcoholism. If you still doubt the message, read the ACOA forums.
Your kids only get one childhood.