As long as you have a plan for outgrowth, I see no reason to move the fish right now. Ballpark from the pic looks like the tank is 6 to 8 times the length of the fish, so for now I'll guess you're OK as long as there are no aggression issues or chemistry problems. Yeah, Blueface angels are quite pretty....but they do get quite large in the long run, so just be aware.
How does he get along with the puffer? I love Valentini puffers.....if I could I would keep one in my tank, but it's too much of a risk for a reef.