The red icon doesn't work for everyone. Some say it works, others say it doesn't. Mine doesn't... The only way to see if I have updates is to manually open the store app myself.
Too many people make excuses on here. On Android, I get the choice as to what apps can automatically update themselves, and even if none of them are set to automatically update, I get a notification every other day or so saying "updates are available" It's perfect. Apple needs to implement something like this
While I agree an option to auto update or not would be nice, I don't see it as any issue with the OS. Even if a user's App Store icon does not update it's not difficult to check every so often. It takes less than 6-8 seconds to press the icon and check for the update list.
To each either own I guess.