Alternative buoyancy is fine, so long as you understand the situation that you are in. However it still makes little sense failing to wear a weight belt, and failing to load that weight belt with the amount of weight corresponding to the volume of your breathing mix multiplied by 0.08 lbs per cu ft. Thus you then and only then have the option to ditch the belt in the early stages of the dive, in case your buoyancy wing (or suit, or both) fails, thus being able to establish neutral buoyancy at that point.
Having such a weight belt also gives you the ability to establish positive buoyancy at the surface after the dive, as well, should the wing and/or suit fail.
There is simply no reason to omit these standard precautions, and diving without any ditchable weight is simply dangerous and negligent. I muted Jeff a long time ago because of his nonsense posts, and today I added ucf to the list. In this way, I do not waste my time on negligent dangerous divers.