I am a lefty, and own several 1911's i have not had any issue with brass ejecting ack into my face, i even carry a 1911 most of the time. I have only shot never owned a pistol that did eject brass right back at me and it was a kimber compact in 9mm.They do too, but the angle is different. My Beretta, Glock, HiPowers, CZ, none of them throw brass into my face. That was unique to all 4 of the 1911s I've owned over the years.
I'm sure a little ejector work would have taken care of it, but I can't get myself to get custom work done on a brand new pistol just to carry it.