Not sure how you came to this conclusion. Lower gear will do less damage then higher gear which is how it should be.
Currently some attacks do crazy amounts of damage because of how the scale with the base damage. For example I was leveling my full heirloom disc priest and still getting 2 shot in the 70-80 range by hunters Aimed shot then kill shot and I was dead.
They have announced ilvl's being scaled up to a minimum but I don't know if this will include lower level BG's or not. The range of ilvls in low level BG's is huge being low ilvl means less health less damage and problems all around. Are you asking blizzard to make low ilvl gear comparable to higher ilvl/heirloom gear? I don't know about you but I believe Better gear should be better.
Hopefully ilvls will scale up in low level BG's so while it wont be the best you can still stand a chance.