I do not know of any horse collar BC that was USCG certified for use as a life jacket. They are optimal for surface flotation but a wing is optimal for horizontal trim in use when submerged. As soon as any air is introduced into either for depth compensation of exposure gear or full tanks, a horse collar rotates head up and a wing generally does not. An Army surplus Mae West may have been an actual life jacket but they were not a BC.
Face planting is just not a problem, for one, keep your reg in your mouth and it does not matter and two face planting is very much a user error issue that can be largely corrected with practice and an open mind to a different way of doing things.
Next time I go diving in a few weeks I am taking my horse collar! I wish I had it a few days ago in Cozumel. It would have been dandy. I was in a 3mm shorty, 6 pounds and zero air introduced. Yes, a little light at safety stop but manageable. A horse collar BC would have been fine.