Man, I wish they had articles like that back when I was learning about FFM's 12 years ago! LOL
I've done lots of bail-out drills, including ditches and surfaces with a removable pony bottle from a entangled rig. Heh, those are a lot of fun and once you do a few, you realize that is really the best option if your rig is entangled.
When I've dove with an FFM out here, I tend to do the surface swim with a standard mask/snorkel. As much as the ambient breather is kool, it doesn't work well with the swells of the california shoreline. In the Boston winter dives, I ran doubles with a pony bottle and a home-made Y switch with these fancy brass QD's a buddy built for me, nice stuff. The whole thing was QD, so if you had to ditch part or all of your equipment it was easy. I'd start the dive from hitting the water in winter, it was too cold to get your face wet! But yea, I understand the "shock" which can happen from super cold water coming in. However, the likelihood the AGA freezes up (only real reason to ditch it) is so slim, I know those regs so well, they usually freeflow if they freeze. We had a bleed-off system for 1st stage freezing as well, but my poseidon regs wouldn't freeze, heh
I miss that rig, I'm kinda upset I sold it.
But yea, I agree that safety is an issue for sure. If you believe the buddy system will save you, if you don't have a backup air source, if you dive deep and in over-head environments, yea stuff is gonna happen. Ya gotta be prepared for OOA situations and ditching, if you can do those things with an FFM, there isn't any harm in having one in my view.