You know, if there's anything Obama has done to appeal to the Hispanic vote, it's his recent immigration order saying that he won't send good illegal students back to El Salvador or wherever. The change in immigration policy has been planned for a while, and it was ICE's response to the repeal of the Arizona immigration laws. It's also been spun like a washing machine by the right-wing press (and the right-wing not-really-the-press, like all of the opinion blogs people have been linked to here).
But even if Obama couldn't run again until 2016, his actions now would still be held for or against Hilary, or whoever, and would work for or against him in four years. The idea sounds better in concept than it would in practice, unfortunately.
But, changes start with ideas, most of which don't pan out, so keep it up.