I'm just under 5' and understand your sizing difficulties. Even a BCD which offers shoulder adjustments doesn't always help with the short waist and proportions. I got a DSS wing and a "travel" backplate (a bit shorter and lighter at 8lb) and have never looked back. It's like diving naked. The stability I have in the water, particularly as a photographer, is so much superior to anything else I've ever tried, and for that alone is worth hauling the plate when I travel. I have 1 weight pocket on each tank strap, and one on each side of the waist strap and I'm good to go. Everything else hangs from D rings (safety sausage, light, etc.) Perfect balance.
I tested a BP/Wing first before I bought, as I was concerned about stability at the surface, ability to be belly-up underwater to catch the manta or sealion swimming over me (one can dream), etc. I feel more safe in the wing than I ever did in a "petite" BCD. Surprised the heck out of me. I can skim much closer to the sand, reef, whatever I want as my buoyancy is better controlled.
YMMV, but do seriously consider it. That said, if I hadn't tried the BP/Wing, the Transpac was the next in line. I felt the Zena was a bit too confining, actually.