People need to be paired based on gear level and skill, Valour doesn't prove either of those. The well geared players need an incentive to play together, if people actually started playing Ranked Warzones competitively, then they would start to get paired with other teams with similar ratings. Problem solved.
However that will never happen unless Bioware makes WH gear easier to obtain. People aren't going to put up with the grind, not that they face in Normal Warzones currently. Hell people have not put up with the grind and left already.
I agree with your intention but not your suggested solution based on gear. Like I tried to say, people can enter WZs in level 9 green gear and put on their augmented WH gear once inside and ruin the experience for the fresh 50s. It would work against it's intention.
Valor is the only constant that can be used for creating more equal teams. Valor level requires a certain amount of WZs played and commendations earned, there is no way to cheat with this stat. If you are Valor 70+, you should have pretty decent gear and PVP experience.
Pairing on skill is impossible, skill cannot be measured by gear rating nor Valor rank. Ranked WZs should be the competitive playing field between the top players. When it comes to dedicated and competitive PvP players, the grind will not matter for those that strive to be on the top.
Edit: I would like to see WH gear become slightly easier and streamlined to aquire, I'm not arguing that point