I wear force fins. I got them because when I was buying my gear, my buddy had some knock-offs, and I saw a cheap pair of the real kind on eBay. They were bright yellow, which I wanted, so I got them. (Also, the bright yellow ensures that they're the "scuba" flavour instead of snorkeling or swimming.)
To surface swim, you have to go on your back and bicycle kick. This isn't a problem in a wing or rear-inflating BC.
On my last two dives, my buddy used a lot less air than me on the first dive. There were a few reasons for that - it was my first boat dive, there were sea lions, and I think he was on a larger tank than my AL80. We were buddies on the second dive, as well.
The current picked up incredibly, and we had to fight, hard. I kept up and used the same amount of air as the buddy who had just used a lot LESS air than I did. I was about 5 feet higher than he was, too, so I was fighting MORE current. He had some fancy expensive split fin. I'm not sure what kind.
If I lost my Force Fins, I'd try a few dives with something else just to see, but I'd buy another pair without hesitation. I would strongly recommend the bungy cord attachments. They make the fin don / doff process laughably easy.
It would be very difficult to lose a pair, as they will force themselves onto your foot as you swim. In other words, they will stay on even if the straps break.