The new glancing blow is in so it is included. The issue is that only head shots really have a chance to stun or knockdown an enemy. So if you miss the head but glance the shoulder for some damage thanks to the new feature, yes-- its not a total miss like it would have been so some damage gets done but in terms of dealing with the zombie and trying to avoid getting hit yourself it does nothing. That is the biggest change. I take more hits than ever before which uses up bandages and food etc. When you get a knockdown or a stun you are so happy as it delays the possible speed up and gives you a moment to get ready.
That is one of the big differences between A18 and all the previous alphas for me. After some slight adaptation for new ranges or timing I always got back to the point where I almost never took a hit in combat. Now I take hits. It doesn't happen in every engagement but it happens daily and that is a drain on medical resources including food AND a big dinner bell to all nearby vultures I might add.
In my last game I was offered a SMG or 10 medicated bandages and it was a no brainer: 10 medicated bandages thank you.