I hope that this is something Riot will address in the future with their new Director of eCommerce. Since IP is directly related to things that are bought in the store. The IP gain and IP costs must be low enough that players will be happy. At the same time, it must take enough time to gain IP where many players will still be tempted to buy champions through RP. Finding that golden balance is the true challenge.
I would hope that Riot will address this soon. But like I said before, since Season 2 Championship is around the corner, I wouldn't expect anything big until after the championship. IP gains and IP costs in general is something a lot of players are not satisfied with, not just the Dominion community. Although, I will admit that we do have a shorter stick in the pile of short sticks.