Personally, I dive the swivels Edd sells and really like them. There are lots of people including Kakuk that are against them. I look at it as a calculated risk. Between my wife and I we have about 8 ball swivels that have been in use for 5 years. People swear they will randomly come apart. I call bs. I'm sure they will if you don't inspect them and make sure everything is in good order. The "failures" I've had have only been two and what happens is you put your gear in the water and the swivel bubbles because the oring is going bad.
I prefer them greatly over angles. Ihink they could carry some risk but I think the failures are grossly overstated. I also thing Kakuk's overreaction by banning the, is ridiculous. But he controls the pool in the Bahamas so you've got to play by his rules.