Dude, Oda is like that. He likes to recycle dessigns and so...
So, by that logic, all women in OP are Nami's relatives or something?
If he was only similar in facial features, I think no one would have basically said anything. In fact, the spoiler providers said he looked like Z, which was an ex marine, but I doubt that was intentional.
This though go beyond: how many characters do you know who have an X in their name (a single, capital X), has the same X shaped scar on the chin, have an X on the chest, even have a similar weapon?
And after people pointed this out, it was suggested there was indeed a spy among the Rocks.
You can think he isn't, sure, but hints are pretty big.