Even in the patch notes it is explained that 109's except E7 have "unfinished" DM in the tail area
Until this is finished people should dial back the hysteria a bit, overall this seems like a great update, but not yet completely finalised.
Another read of Jason's - A Heads Up - post in General Discussions will benefit.
Such a huge update (done in difficult conditions that we all all aware of and struggling with) needs a bit of patience.
Testing needs to be done offline to show issues that are purely related to new DM whether interested only in MP and have no interest in offline, to isolate issues, otherwise it is just noise, and little use to Dev's.
The fact that 109 is mentioned in patch notes indicates that Devs are aware and working on this, just very unfortunate that late changes on the one aircraft that is in every single fight/battle/MP experience was effected in the patch.
Overall (I feel) the initial growing pains will be outweighed by such a fundamental improvement to the way damage is modeled.
Perhaps this is the wrong thread.. but just a little more patience is needed regardless of how some feel MP is totally broken