Of course. Steps could be made, though; thus far he hasn't been very impressive on that front, following one non-judgmental flash of hope.
And yes, I realize it only affects a portion of those applying for licenses: but he's the pope, it's his portion. He's obviously not going to change our government. He can, however, change the church, which has been the focal point of much of the anti-gay rights movement. Removing that support would be tremendous.
Let me put it another way. He is the one person in the world who can, with a single announcement, make a huge step forward for the civil rights of millions of people across the entire world. I find it heartbreaking that, despite being a generally good person, when the opportunity came over and over to take that step, to even feel it out, he chose not to do so.