YES!!! I HAVE YOUR NEGATIVE!
I ran a Magpul B.A.D. lever without question for about 2 years... but I was stationary at a range playing with paper targets. Yes it worked flawlessly.
When I started to get more dynamic with my actions, reloading on the run where errors could mean the difference between life and death I was finding that in almost every case that I had a bolt lock to the rear after emptying a mag that friggen BAD lever would slam my bolt forward before I had the new mag in resulting in a need to pull the charging handling adding extra movements to an already complicated and stressful situation.... every time.
Where it was happening consistently was while I went to bolt lock and I would pivot the rifle into the crook of my arm to begin to seat the new magazine. My finger would constantly hit the lever slamming the bolt forward before the new mag was seated forcing me to pull the charging handle again.
Seems simple enough.. add running, rolling and stress and you quickly find your wondering why the hell your rifle isn't firing like it should and that a round was never seated in the chamber.
So with that said, I am 50/50 on the BAD lever. Mine sits comfortably in my parts bin because I felt that in a time of need it was more of a hindrance to me than a convenience while at the range.