Yes, and it makes some sense, assuming Vaz keeps hitting this well.
If he catches a lot, he will need rest. I'm not sure DH'ing will give him enough "rest," but he should be able to do it at times.
Another thought is that we currently have 8 players hitting over .810 the last 4 weeks and Beni at .757. I'm not sure there is really much urgency to try to play Vaz everyday within this context, and we don't want to burn him out, either.
We could maybe have Leon catch Sale & Price, and maybe Vaz could DH one of those "off day" and sit out every 5th game. Maybe he could catch 6 of 10 games and DH 3 of 10 for a while.
I'm not sure I want JD in the OF that much as he will be playing the OF at NL parks, too.