Nah history has shown, hell win trading Ilum has shown that 90% of people do pvp not for the love of their faction or pvp, but for the easy road into phat loot. I mean would people care as much about arena in WoW if it didn't come with gear, titles and mount?
Your idea all sounds good on paper like WAR at launch, they tried the exact same thing as you describe, little rewards that benefit the faction, but when people found out you get more xp and valor faster in BGs, it was 4 maps from 1-50 and beyond. When they finally fixed RvR it was way too late.