OPS isn't that important for Vazquez anyway. He just needs to not be an automatic out at the plate. If he can have an OBP over .300, then he can be a really solid player, no matter what his slugging percentage is.
He could even have an OPS of around 660 and still be a good starting player, if it's a 330 OBP/330 SLG, rather than a 280 OBP/380 SLG.
Basically, if he can't get the OBP over .300, then he is still Jose Molina, who is a really useful part-time catcher whose defense makes up for a lot of the bad hitting. That's basically who he is right now, as a rookie who just turned 24 last week.
If he could just improve enough to hit like Brad Ausmus, 251/325/344, then he would be a very solid starting catcher, despite the 670 OPS.
It's encouraging that he's got 10 walks to 16 Ks so far, hopefully he can keep that up.