I always assumed they didn't add variant human because it was just too strong compared to the other races (I'm glad they didn't add it for that reason). It seemed like they wanted things to be balanced because of that choice. All we're saying is that they can do a better job of balancing with this new system than what they have shown currently.
This is what I assume too. Human will always be the most played race just because most players empathize the strongest with someone that looks like them. They don't need to also be the optimal choice for every build thanks to getting a free feat.
That said the current iteration of human is really no good, if they are indeed getting the traits we think they are.
