Yes to both. Please spell out how half a MM is affecting the functionality of the laptop.
"Functionality" is a rather choice word. I guess it's a little off, or at least not quite to-the-point. When one worries about any given aspect about their computer, it can be about a number of things; that worry can also be founded on good reason, the want of a perfect product (in the absence of perfection due to a perceived imperfection), or simply worry of something possibly being wrong.
In my case, I look at the trackpad and go through a thought-process in this order (not exactly, but in written form it's easier to process this way):
1. Is this the norm? Is my Air in the 1 percentile, or 10 percentile, or some lower number of Airs that didn't quite turn out perfect? Or is this actually something that's quite off and not something that should happen?
2. What could be causing this? Could it be battery-swelling? Could it be a part underneath the trackpad is not actually placed properly or securely? Could it be the trackpad itself is not quite properly constructed?
3. How will this affect the performance of my device in the future? Will the trackpad warp slightly further, causing a truly annoying surface to work on? Will the trackpad possibly break?
4. Moving on from point 3, the trackpad is made of a solid piece of glass material. Glass is not built to bend. If one end is higher than the other, I want to make sure that there's no chance that the glass may crack or break.
I could probably expand the list a little further, but you catch the drift at this point I suppose.
Again, this thread is simply inquisitive and not so worrisome. I didn't intend to have to write up a large post like this explaining myself: but you asked.
I love my tech, and I am a perfectionist at heart. I will worry senselessly, but I won't panic senselessly; I will post with good reason, but I will not spam without reason. I don't return my product simply because I perceive a defect or a possible defect unless it is directly effecting my workflow or enjoyment of the product in a very real way. So this thread exists simply to inquire.