Question for people who received perfect quality Nexus 7's

So, I recently returned my Nexus 7 due to the screen lifting issue and just received my new on in the mail today. Unfortunately, it appears to have the same issue, except it's not nearly as noticeable. With my last N7, I could feel the glass move, however with this one I can only see that the glass is raised just a hair from the silver outline.

Essentially, I was wondering if this is actually normal? The glass seems much more stable, but I'm not sure if I should return it again.