I've always hated the prefix "trans" applied to these things. I'm not changing anything, just seeking treatment for a medical problem. I've always been me, and always will be me, regardless of what anyone else may say. There needs to be a proper medical term for it, not psychological because it is not a mental problem, it is a physical problem.
The article's "polygender" makes sense for people who do not identify as simply female or male, but the other terms proposed I think are pretty far out there.