In SL we saw the biggest move in PvE players gearing in Rated PvP only to skip farming in PvE, so that they can destroy the PvE content after (which is stupid and makes them end the content faster, but whatever).
While what you say makes perfect sense, I am sure that there are FAAAR less people doing that then the ones that actually geared in PvP cause it was easier to come with PvE 210-215 ilvl gear and rise for that PvP 220/226 ilvl gear.
From my PoV, they should have just added templates between brackets, so that if you are pre-1400 all have max 200ilvl, pre 1600 all have max 207, pre 1800 all have max 213. So that way, if a 220 ilvl PvP geared guy starts sucking in skill, he would not win just because he was boosted to 2100, and he will have to fight for that climb like the rest of us.
But hell, even those changes are better then not having them.