I shoot Muzzy's and G5 Strikers, both are fixed blades. So, I'm not going to make an argument that Rage are the greatest thing since sliced bread, however, when you say "this type of malfunction should be great pause for concern", I'm not sure that's fair. To hit both shoulders at 20 yards means this deer was completely broadside. I'd have to say the "malfunction" is in the shot. I'm glad you were able to make a recovery, but I hear too many people blaming the performance of a broad head when the real problem was shot placement. I also find it hard to believe that she could have been heart and lung shot but also double shoulder shot. Based on the anatomy of a deer, that's just not possible.
Again, congrats on the recovery, and again, I'm a big fan of fixed blade broad heads, but I'm not buying that this was a failure in the broad head.