Have a 2016.5, myself, and there are a couple of similar slight alignment and fitment issues with the body panels.
The hood aligns well enough along the right-rear area as it hands over the cowling, but not the left-rear area above the cowling. And the rear hatch is ever-so-slightly misaligned such that the gap along the left edge of the hatch (where it nearly meets the body) is a tad wider than the gap along the right edge. One of the doors has a very small width difference in the gap along the trailing edge of the door, a bit wider near the bottom of the door as compared to the top.
Again, "slight" is the operative word. Some panels and pieces have the ability to be slightly adjusted, but most just bolt on ... and that bolt's where it is, without much to be done about it. Chalk it up to slight differences in the manufacturing of parts, aging of tooling, which day of the week it gets made on, which worker does that specific assembly, minor torque/fit issues related to that specific part on that car (as compared to the next part or prior part, which got installed slightly differently).
Some panels and pieces rely on brackets, and pressure can be applied to the panel holding that bracket in such a way that the panel is moved a modest amount, deflecting enough that alignment's improved. But, many cannot be so deflected. Myself, I'm not a "body shop" person, so I haven't bothered to look into which parts could be adjusted, which deflected, and none of the minor alignment/fitment questions have bothered me enough to pay a body shop to "correct" them.
If this were a $350K McLaren, just come off the line in the past 5yrs, I'd probably be squalling about such little defects (off the as-engineered plans). But, perhaps not even then.
same here.
