I think "how" will certainly beat the current master. Even if "why" performs well in the second phase, "how" is not to be taken lightly and will surely do it's job too, so the third phase will decide, and we all know "how" is better in PvP.
I'm also pretty sure "how" helped newbies a lot more than "why". Just look at the deck help forum section. A lot of newbies ask "how can I improve my deck?", but none of them asks "why should I improve my deck?".